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Update and polish postmaster and postgres help output and man pages.
This commit is contained in:
Peter Eisentraut
parent
3eaf3363d7
commit
8a9315ca92
@ -1,217 +1,159 @@
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<!--
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<!--
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$Header: /cvsroot/pgsql/doc/src/sgml/ref/postgres-ref.sgml,v 1.14 2000/10/05 19:48:18 momjian Exp $
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$Header: /cvsroot/pgsql/doc/src/sgml/ref/postgres-ref.sgml,v 1.15 2000/11/14 18:11:31 petere Exp $
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Postgres documentation
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Postgres documentation
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-->
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-->
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<refentry id="APP-POSTGRES">
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<refentry id="APP-POSTGRES">
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<docinfo>
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<date>2000-11-12</date>
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</docinfo>
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<refmeta>
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<refmeta>
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<refentrytitle id="APP-POSTGRES-TITLE">
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<refentrytitle id="APP-POSTGRES-TITLE"><application>postgres</application></refentrytitle>
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<application>postgres</application>
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<manvolnum>1</manvolnum>
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</refentrytitle>
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<refmiscinfo>Application</refmiscinfo>
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<refmiscinfo>Application</refmiscinfo>
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</refmeta>
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</refmeta>
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<refnamediv>
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<refnamediv>
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<refname>
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<refname>postgres</refname>
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<application>postgres</application>
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<refpurpose>Run a <productname>PostgreSQL</productname> single-user backend</refpurpose>
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</refname>
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<refpurpose>
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Run a <productname>Postgres</productname> single-user backend
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</refpurpose>
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</refnamediv>
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</refnamediv>
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<refsynopsisdiv>
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<refsynopsisdiv>
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<refsynopsisdivinfo>
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<cmdsynopsis>
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<date>1999-07-20</date>
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<!-- standalone call -->
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</refsynopsisdivinfo>
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<command>postgres</command>
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<synopsis>
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<arg>-A <group choice="plain"><arg>0</arg><arg>1</arg></group></arg>
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postgres [ <replaceable class="parameter">dbname</replaceable> ]
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<arg>-B <replaceable>nbuffers</replaceable></arg>
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postgres [ -B <replaceable class="parameter">nBuffers</replaceable> ] [ -C ] [ -D <replaceable class="parameter">DataDir</replaceable> ] [ -E ] [ -F ]
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<arg>-c <replaceable>name</replaceable>=<replaceable>value</replaceable></arg>
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[ -O ] [ -P ] [ -Q ] [ -S <replaceable class="parameter">SortSize</replaceable> ] [ -d [ <replaceable class="parameter">DebugLevel</replaceable> ] ] [ -e ]
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<arg>-d <replaceable>debug-level</replaceable></arg>
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[ -o ] [ <replaceable class="parameter">OutputFile</replaceable> ] [ -s ] [ -v <replaceable class="parameter">protocol</replaceable> ] [ <replaceable class="parameter">dbname</replaceable> ]
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<arg>-D <replaceable>datadir</replaceable></arg>
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</synopsis>
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<arg>-e</arg>
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<arg>-E</arg>
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<arg>-f<group choice="plain"><arg>s</arg><arg>i</arg><arg>t</arg><arg>n</arg><arg>m</arg><arg>h</arg></group></arg>
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<arg>-F</arg>
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<arg>-i</arg>
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<arg>-L</arg>
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<arg>-N</arg>
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<arg>-o <replaceable>file-name</replaceable></arg>
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<arg>-O</arg>
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<arg>-P</arg>
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<group>
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<arg>-s</arg>
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<arg>-t<group choice="plain"><arg>pa</arg><arg>pl</arg><arg>ex</arg></group></arg>
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</group>
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<arg>-S <replaceable>sort-mem</replaceable></arg>
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<arg>-W <replaceable>seconds</replaceable></arg>
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<arg choice="plain"><replaceable>database</replaceable></arg>
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<sbr>
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<!-- postmaster fork -->
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<command>postgres</command>
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<arg>-A <group choice="plain"><arg>0</arg><arg>1</arg></group></arg>
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<arg>-B <replaceable>nbuffers</replaceable></arg>
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<arg>-c <replaceable>name</replaceable>=<replaceable>value</replaceable></arg>
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<arg>-d <replaceable>debug-level</replaceable></arg>
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<arg>-D <replaceable>datadir</replaceable></arg>
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<arg>-e</arg>
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<arg>-f<group choice="plain"><arg>s</arg><arg>i</arg><arg>t</arg><arg>n</arg><arg>m</arg><arg>h</arg></group></arg>
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<arg>-F</arg>
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<arg>-i</arg>
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<arg>-L</arg>
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<arg>-o <replaceable>file-name</replaceable></arg>
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<arg>-O</arg>
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<arg>-p <replaceable>database</replaceable></arg>
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<arg>-P</arg>
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<group>
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<arg>-s</arg>
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<arg>-t<group choice="plain"><arg>pa</arg><arg>pl</arg><arg>ex</arg></group></arg>
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</group>
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<arg>-S <replaceable>sort-mem</replaceable></arg>
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<arg>-v <replaceable>protocol-version</replaceable></arg>
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<arg>-W <replaceable>seconds</replaceable></arg>
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</cmdsynopsis>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para>
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The <filename>postgres</filename> executable is the actual
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<productname>PostgreSQL</productname> server process that processes
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queries. The second form above is how
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<application>postgres</application> is invoked by the <xref
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linkend="app-postmaster" endterm="app-postmaster-title"> (only
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conceptually, since both <filename>postmaster</filename> and
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<filename>postgres</filename> are in fact the same program); it
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should not be invoked directly this way. The first form invokes
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the server directly in interactive mode. The primary use for this
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mode is for bootstrapping by <xref linkend="app-initdb"
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endterm="app-initdb-title">.
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</para>
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<para>
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When invoked in interactive mode from the shell, the user can enter
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queries and the results will be printed to the screen, but in a
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form that is more useful for developers than end users. But note
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that running a single-user backend is not truly suitable for
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debugging the server since no realistic inter-process communication
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and locking will happen.
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</para>
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<para>
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When running a stand-alone backend the session user name will
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automatically be set to the current effective Unix user name. If
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that user does not exist the server will not start.
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</para>
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<refsect2>
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<title>Options</title>
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<refsect2 id="R2-APP-POSTGRES-1">
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<refsect2info>
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<date>1999-05-19</date>
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</refsect2info>
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<title>
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Inputs
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</title>
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<para>
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<para>
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<application>postgres</application> accepts the following command line arguments:
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When <application>postgres</application> is started by a <xref
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linkend="app-postmaster" endterm="app-postmaster-title"> then it
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inherits all options set by the latter. Additionally,
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<application>postgres</application>-specific options can be passed
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from the <application>postmaster</application> with the
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<option>-o</option> switch.
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</para>
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<para>
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You can avoid having to type these options by setting up a
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configuration file. See the <citetitle>Administrator's
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Guide</citetitle> for details. Some (safe) options can also be
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set from the connecting client in an application-dependent way.
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For example, if the environment variable <envar>PGOPTIONS</envar>
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is set, then libpq-based clients will pass that string to the
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server, which will interpret it as
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<application>postgres</application> command-line options.
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</para>
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<refsect3>
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<title>General Purpose</title>
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<para>
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The options <option>-A</option>, <option>-B</option>,
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<option>-c</option>, <option>-d</option>, <option>-D</option>,
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and <option>-F</option> have the same meaning as with the <xref
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linkend="app-postmaster" endterm="app-postmaster-title">.
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</para>
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<variablelist>
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<variablelist>
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<varlistentry>
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<term><replaceable class="parameter">dbname</replaceable></term>
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<listitem>
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<para>
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The optional argument
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<replaceable class="parameter">dbname</replaceable>
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specifies the name of the database to be accessed.
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<replaceable class="parameter">dbname</replaceable>
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defaults to the value of the
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<envar>USER</envar>
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environment variable.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>-B <replaceable class="parameter">nBuffers</replaceable></term>
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<listitem>
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<para>
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If the backend is running under the
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<application>postmaster</application>,
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<replaceable class="parameter">nBuffers</replaceable>
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is the number of shared-memory buffers that the
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<application>postmaster</application>
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has allocated for the backend server processes that it starts. If the
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backend is running stand-alone, this specifies the number of buffers to
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allocate. This value defaults to 64 buffers, where each buffer is 8k bytes
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(or whatever BLCKSZ is set to in config.h).
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>-C</term>
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<listitem>
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<para>
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Do not show the server version number.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>-D <replaceable class="parameter">DataDir</replaceable></term>
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<listitem>
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<para>
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Specifies the directory to use as the root of the tree of database
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directories. If -D is not given, the default data directory name is
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the value of the environment variable
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<envar>PGDATA</envar>.
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If <envar>PGDATA</envar> is not set, then the directory used is
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<filename>$POSTGRESHOME/data</filename>.
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If neither environment variable is set and this command-line
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option is not specified, the default directory that was
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set at compile-time is used.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>-E</term>
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<listitem>
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<para>
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Echo all queries.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>-F</term>
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<listitem>
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<para>
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Disable an automatic <function>fsync()</function> call after each transaction.
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This option improves performance, but an operating system crash
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while a transaction is in progress may cause the loss of
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the most recently entered data. Without the <function>fsync()</function> call
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the data is buffered by the operating system, and written to disk sometime later.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>-O</term>
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<listitem>
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<para>
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Override restrictions, so system table structures can be modified.
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These tables are typically those with a leading
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<literal>pg_</literal> in the table name.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>-P</term>
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<listitem>
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<para>
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Ignore system indexes to scan/update system
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tuples. The <command>REINDEX</command> for system tables/indexes
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requires this option. System tables are
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typically those with a leading <literal>pg_</literal> in the
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table name.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>-Q</term>
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<listitem>
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<para>
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Specifies "quiet" mode.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>-S <replaceable class="parameter">SortSize</replaceable></term>
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<listitem>
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<para>
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Specifies the amount of memory to be used by internal sorts and hashes
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before resorting to temporary disk files. The value is specified in
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kilobytes, and defaults to 512 kilobytes. Note that for a complex query,
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several sorts and/or hashes might be running in parallel, and each one
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will be allowed to use as much as
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<replaceable class="parameter">SortSize</replaceable> kilobytes
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before it starts to put data into temporary files.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>-d [ <replaceable class="parameter">DebugLevel</replaceable> ]</term>
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<listitem>
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<para>
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The optional argument <replaceable class="parameter">DebugLevel</replaceable>
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determines the amount of debugging output the backend servers will
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produce.
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If <replaceable class="parameter">DebugLevel</replaceable>
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is one, the postmaster will trace all connection traffic,
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and nothing else.
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For levels two and higher,
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debugging is turned on in the backend process and the postmaster
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displays more information,
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including the backend environment and process traffic.
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Note that if no file is specified for backend servers to
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send their debugging output then this output will appear on the
|
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controlling tty of their parent <application>postmaster</application>.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<varlistentry>
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<term>-e</term>
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<term>-e</term>
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||||||
<listitem>
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<listitem>
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<para>
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<para>
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This option controls how dates are interpreted upon
|
Sets the default date style to <quote>European</quote>, which
|
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input to and output from the database.
|
means that the <quote>day before month</quote> (rather than
|
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If the <option>-e</option>
|
month before day) rule is used to interpret ambiguous date
|
||||||
option is supplied, then dates passed to and from the frontend
|
input, and that the day is printed before the month in certain
|
||||||
processes will be assumed to be in "European"
|
date output formats. See the <citetitle>PostgreSQL User's
|
||||||
format (<literal>DD-MM-YYYY</literal>),
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Guide</citetitle> for more information.
|
||||||
otherwise dates are assumed to be in
|
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||||||
"American" format (<literal>MM-DD-YYYY</literal>).
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||||||
Dates are accepted by the backend in a wide variety of formats,
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||||||
and for input dates this switch mostly affects the interpretation
|
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||||||
for ambiguous cases.
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||||||
See the <citetitle>PostgreSQL User's Guide</citetitle>
|
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||||||
for more information.
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||||||
</para>
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</para>
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</listitem>
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</listitem>
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</varlistentry>
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</varlistentry>
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||||||
|
|
||||||
<varlistentry>
|
<varlistentry>
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<term>-o <replaceable class="parameter">OutputFile</replaceable></term>
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<term>-o <replaceable class="parameter">file-name</replaceable></term>
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||||||
<listitem>
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<listitem>
|
||||||
<para>
|
<para>
|
||||||
Sends all debugging and error output to
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Sends all debugging and error output to
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||||||
@ -226,6 +168,17 @@ postgres [ -B <replaceable class="parameter">nBuffers</replaceable> ] [ -C ] [ -
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</listitem>
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</listitem>
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</varlistentry>
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</varlistentry>
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||||||
|
|
||||||
|
<varlistentry>
|
||||||
|
<term>-P</term>
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||||||
|
<listitem>
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||||||
|
<para>
|
||||||
|
Ignore system indexes to scan/update system tuples. The
|
||||||
|
<command>REINDEX</command> command for system tables/indexes
|
||||||
|
requires this option to be used.
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||||||
|
</para>
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||||||
|
</listitem>
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||||||
|
</varlistentry>
|
||||||
|
|
||||||
<varlistentry>
|
<varlistentry>
|
||||||
<term>-s</term>
|
<term>-s</term>
|
||||||
<listitem>
|
<listitem>
|
||||||
@ -238,43 +191,42 @@ postgres [ -B <replaceable class="parameter">nBuffers</replaceable> ] [ -C ] [ -
|
|||||||
</varlistentry>
|
</varlistentry>
|
||||||
|
|
||||||
<varlistentry>
|
<varlistentry>
|
||||||
<term>-v <replaceable class="parameter">protocol</replaceable></term>
|
<term>-S <replaceable class="parameter">sort-mem</replaceable></term>
|
||||||
<listitem>
|
<listitem>
|
||||||
<para>
|
<para>
|
||||||
Specifies the number of the frontend/backend protocol to be used for this
|
Specifies the amount of memory to be used by internal sorts and hashes
|
||||||
particular session.
|
before resorting to temporary disk files. The value is specified in
|
||||||
|
kilobytes, and defaults to 512 kilobytes. Note that for a complex query,
|
||||||
|
several sorts and/or hashes might be running in parallel, and each one
|
||||||
|
will be allowed to use as much as
|
||||||
|
<replaceable class="parameter">sort-mem</replaceable> kilobytes
|
||||||
|
before it starts to put data into temporary files.
|
||||||
</para>
|
</para>
|
||||||
</listitem>
|
</listitem>
|
||||||
</varlistentry>
|
</varlistentry>
|
||||||
|
|
||||||
</variablelist>
|
</variablelist>
|
||||||
</para>
|
</refsect3>
|
||||||
|
|
||||||
<para>
|
<refsect3>
|
||||||
There are several other options that may be specified, used mainly
|
<title>Options for stand-alone mode</title>
|
||||||
for debugging purposes. These are listed here only for the use by
|
|
||||||
<productname>Postgres</productname> system developers.
|
|
||||||
<emphasis>Use of any of these options is highly discouraged.</emphasis>
|
|
||||||
Furthermore, any of these options may disappear or change at any time.
|
|
||||||
</para>
|
|
||||||
|
|
||||||
<para>
|
|
||||||
These special-case options are:
|
|
||||||
|
|
||||||
<variablelist>
|
<variablelist>
|
||||||
<varlistentry>
|
<varlistentry>
|
||||||
<term>-A [ n | r | b | Q | X ]</term>
|
<term><replaceable class="parameter">database</replaceable></term>
|
||||||
<listitem>
|
<listitem>
|
||||||
<para>
|
<para>
|
||||||
This option generates a tremendous amount of output.
|
Specifies the name of the database to be accessed. If it is
|
||||||
|
omitted it defaults to the user name.
|
||||||
</para>
|
</para>
|
||||||
</listitem>
|
</listitem>
|
||||||
</varlistentry>
|
</varlistentry>
|
||||||
|
|
||||||
<varlistentry>
|
<varlistentry>
|
||||||
<term>-L</term>
|
<term>-E</term>
|
||||||
<listitem>
|
<listitem>
|
||||||
<para>
|
<para>
|
||||||
Turns off the locking system.
|
Echo all queries.
|
||||||
</para>
|
</para>
|
||||||
</listitem>
|
</listitem>
|
||||||
</varlistentry>
|
</varlistentry>
|
||||||
@ -287,6 +239,21 @@ postgres [ -B <replaceable class="parameter">nBuffers</replaceable> ] [ -C ] [ -
|
|||||||
</para>
|
</para>
|
||||||
</listitem>
|
</listitem>
|
||||||
</varlistentry>
|
</varlistentry>
|
||||||
|
</variablelist>
|
||||||
|
</refsect3>
|
||||||
|
|
||||||
|
<refsect3>
|
||||||
|
<title>Semi-internal Options</title>
|
||||||
|
|
||||||
|
<para>
|
||||||
|
There are several other options that may be specified, used
|
||||||
|
mainly for debugging purposes. These are listed here only for
|
||||||
|
the use by <productname>PostgreSQL</productname> system
|
||||||
|
developers. <emphasis>Use of any of these options is highly
|
||||||
|
discouraged.</emphasis> Furthermore, any of these options may
|
||||||
|
disappear or change in a future release without notice.
|
||||||
|
</para>
|
||||||
|
<variablelist>
|
||||||
|
|
||||||
<varlistentry>
|
<varlistentry>
|
||||||
<term>-f [ s | i | m | n | h ]</term>
|
<term>-f [ s | i | m | n | h ]</term>
|
||||||
@ -320,14 +287,32 @@ postgres [ -B <replaceable class="parameter">nBuffers</replaceable> ] [ -C ] [ -
|
|||||||
</varlistentry>
|
</varlistentry>
|
||||||
|
|
||||||
<varlistentry>
|
<varlistentry>
|
||||||
<term>-p <replaceable class="parameter">dbname</replaceable></term>
|
<term>-L</term>
|
||||||
<listitem>
|
<listitem>
|
||||||
<para>
|
<para>
|
||||||
Indicates to the backend server that it has been started by a
|
Turns off the locking system.
|
||||||
<application>postmaster</application>
|
</para>
|
||||||
and makes different assumptions about buffer pool management, file
|
</listitem>
|
||||||
descriptors, etc. Switches following -p are restricted to those
|
</varlistentry>
|
||||||
considered "secure".
|
|
||||||
|
<varlistentry>
|
||||||
|
<term>-O</term>
|
||||||
|
<listitem>
|
||||||
|
<para>
|
||||||
|
Allows the structure of system tables to be modified. This is
|
||||||
|
used by <application>initdb</application>.
|
||||||
|
</para>
|
||||||
|
</listitem>
|
||||||
|
</varlistentry>
|
||||||
|
|
||||||
|
<varlistentry>
|
||||||
|
<term>-p <replaceable class="parameter">database</replaceable></term>
|
||||||
|
<listitem>
|
||||||
|
<para>
|
||||||
|
Indicates that this server has been started by a
|
||||||
|
<application>postmaster</application> and makes different
|
||||||
|
assumptions about buffer pool management, file descriptors,
|
||||||
|
etc.
|
||||||
</para>
|
</para>
|
||||||
</listitem>
|
</listitem>
|
||||||
</varlistentry>
|
</varlistentry>
|
||||||
@ -336,107 +321,49 @@ postgres [ -B <replaceable class="parameter">nBuffers</replaceable> ] [ -C ] [ -
|
|||||||
<term>-t pa[rser] | pl[anner] | e[xecutor]</term>
|
<term>-t pa[rser] | pl[anner] | e[xecutor]</term>
|
||||||
<listitem>
|
<listitem>
|
||||||
<para>
|
<para>
|
||||||
Print timing statistics for each query relating to each of the major
|
Print timing statistics for each query relating to each of the
|
||||||
system modules. This option cannot be used with <option>-s</option>.
|
major system modules. This option cannot be used together
|
||||||
|
with the <option>-s</option> option.
|
||||||
</para>
|
</para>
|
||||||
</listitem>
|
</listitem>
|
||||||
</varlistentry>
|
</varlistentry>
|
||||||
</variablelist>
|
|
||||||
</para>
|
|
||||||
</refsect2>
|
|
||||||
|
|
||||||
<refsect2 id="R2-APP-POSTGRES-2">
|
|
||||||
<refsect2info>
|
|
||||||
<date>1999-05-19</date>
|
|
||||||
</refsect2info>
|
|
||||||
<title>
|
|
||||||
Outputs
|
|
||||||
</title>
|
|
||||||
<para>
|
|
||||||
Of the nigh-infinite number of error messages you may see when you
|
|
||||||
execute the backend server directly, the most common will probably be:
|
|
||||||
|
|
||||||
<variablelist>
|
|
||||||
<varlistentry>
|
<varlistentry>
|
||||||
<term><computeroutput>
|
<term>-v <replaceable class="parameter">protocol</replaceable></term>
|
||||||
semget: No space left on device
|
|
||||||
</computeroutput></term>
|
|
||||||
<listitem>
|
<listitem>
|
||||||
<para>
|
<para>
|
||||||
If you see this message, you should run the
|
Specifies the version number of the frontend/backend protocol
|
||||||
<application>ipcclean</application>
|
to be used for this particular session.
|
||||||
command. After doing this, try starting
|
|
||||||
<application>postmaster</application>
|
|
||||||
again. If this still doesn't work, you probably need to configure
|
|
||||||
your kernel for shared memory and semaphores as described in the
|
|
||||||
installation notes. If you have a kernel with particularly small shared memory
|
|
||||||
and/or semaphore limits, you may have to reconfigure your kernel to increase
|
|
||||||
its shared memory or semaphore parameters.
|
|
||||||
|
|
||||||
<tip>
|
|
||||||
<para>
|
|
||||||
You may be able to postpone
|
|
||||||
reconfiguring your kernel by decreasing -B to reduce
|
|
||||||
<productname>Postgres</productname>' shared memory
|
|
||||||
consumption.
|
|
||||||
</para>
|
|
||||||
</tip>
|
|
||||||
</para>
|
</para>
|
||||||
</listitem>
|
</listitem>
|
||||||
</varlistentry>
|
</varlistentry>
|
||||||
|
|
||||||
|
<varlistentry>
|
||||||
|
<term>-W <replaceable class="parameter">seconds</replaceable></term>
|
||||||
|
<listitem>
|
||||||
|
<para>
|
||||||
|
As soon as this option is encountered, the process sleeps for
|
||||||
|
the specified amount of seconds. This gives developers time
|
||||||
|
to attach a debugger to the backend process.
|
||||||
|
</para>
|
||||||
|
</listitem>
|
||||||
|
</varlistentry>
|
||||||
|
|
||||||
</variablelist>
|
</variablelist>
|
||||||
</para>
|
</refsect3>
|
||||||
</refsect2>
|
</refsect2>
|
||||||
</refsynopsisdiv>
|
</refsect1>
|
||||||
|
|
||||||
<refsect1 id="R1-APP-POSTGRES-1">
|
<refsect1>
|
||||||
<refsect1info>
|
<title>See also</title>
|
||||||
<date>1999-05-19</date>
|
|
||||||
</refsect1info>
|
|
||||||
<title>
|
|
||||||
Description
|
|
||||||
</title>
|
|
||||||
|
|
||||||
<para>
|
<para>
|
||||||
The Postgres backend server can be executed directly from the user shell.
|
<xref linkend="app-initdb" endterm="app-initdb-title">,
|
||||||
This should be done only while debugging by the DBA, and should not be
|
<xref linkend="app-ipcclean" endterm="app-ipcclean-title">,
|
||||||
done while other Postgres backends are being managed by a
|
<xref linkend="app-postmaster" endterm="app-postmaster-title">
|
||||||
<application>postmaster</application>
|
|
||||||
on this set of databases.
|
|
||||||
</para>
|
|
||||||
|
|
||||||
<para>
|
|
||||||
Some of the switches explained here can be passed to the backend
|
|
||||||
through the "database options" field of a connection request, and thus can be
|
|
||||||
set for a particular backend without going to the trouble of restarting the
|
|
||||||
postmaster. This is particularly handy for debugging-related switches.
|
|
||||||
</para>
|
|
||||||
|
|
||||||
<para>
|
|
||||||
The optional argument <replaceable class="parameter">dbname</replaceable>
|
|
||||||
specifies the name of the database to be accessed.
|
|
||||||
<replaceable class="parameter">dbname</replaceable>
|
|
||||||
defaults to the value of the
|
|
||||||
<envar>USER</envar> environment variable.
|
|
||||||
</para>
|
</para>
|
||||||
</refsect1>
|
</refsect1>
|
||||||
|
|
||||||
<refsect1 id="R1-APP-POSTGRES-2">
|
|
||||||
<refsect1info>
|
|
||||||
<date>1998-10-04</date>
|
|
||||||
</refsect1info>
|
|
||||||
<title>
|
|
||||||
Notes
|
|
||||||
</title>
|
|
||||||
|
|
||||||
<para>
|
|
||||||
Useful utilities for dealing with shared memory problems include
|
|
||||||
<application>ipcs(1)</application>,
|
|
||||||
<application>ipcrm(1</application>), and
|
|
||||||
<application>ipcclean(1)</application>.
|
|
||||||
See also <xref linkend="app-postmaster" endterm="app-postmaster-title">.
|
|
||||||
</para>
|
|
||||||
</refsect1>
|
|
||||||
</refentry>
|
</refentry>
|
||||||
|
|
||||||
<!-- Keep this comment at the end of the file
|
<!-- Keep this comment at the end of the file
|
||||||
|
|||||||
@ -1,88 +1,256 @@
|
|||||||
<!--
|
<!--
|
||||||
$Header: /cvsroot/pgsql/doc/src/sgml/ref/postmaster.sgml,v 1.14 2000/11/13 23:57:20 momjian Exp $
|
$Header: /cvsroot/pgsql/doc/src/sgml/ref/postmaster.sgml,v 1.15 2000/11/14 18:11:31 petere Exp $
|
||||||
Postgres documentation
|
Postgres documentation
|
||||||
-->
|
-->
|
||||||
|
|
||||||
<refentry id="APP-POSTMASTER">
|
<refentry id="APP-POSTMASTER">
|
||||||
|
<docinfo>
|
||||||
|
<date>2000-11-12</date>
|
||||||
|
</docinfo>
|
||||||
|
|
||||||
<refmeta>
|
<refmeta>
|
||||||
<refentrytitle id="APP-POSTMASTER-TITLE">
|
<refentrytitle id="APP-POSTMASTER-TITLE"><application>postmaster</application></refentrytitle>
|
||||||
<application>postmaster</application>
|
<manvolnum>1</manvolnum>
|
||||||
</refentrytitle>
|
|
||||||
<refmiscinfo>Application</refmiscinfo>
|
<refmiscinfo>Application</refmiscinfo>
|
||||||
</refmeta>
|
</refmeta>
|
||||||
<refnamediv>
|
|
||||||
<refname id="postmaster-ref">
|
|
||||||
<application>postmaster</application>
|
|
||||||
</refname>
|
|
||||||
<refpurpose>
|
|
||||||
Run the <productname>Postgres</productname> multi-user backend
|
|
||||||
</refpurpose>
|
|
||||||
</refnamediv>
|
|
||||||
<refsynopsisdiv>
|
|
||||||
<refsynopsisdivinfo>
|
|
||||||
<date>1999-07-20</date>
|
|
||||||
</refsynopsisdivinfo>
|
|
||||||
<synopsis>
|
|
||||||
postmaster [ -B <replaceable class="parameter">nBuffers</replaceable> ] [ -D <replaceable class="parameter">DataDir</replaceable> ] [ -N <replaceable class="parameter">maxBackends</replaceable> ] [ -S ]
|
|
||||||
[ -d <replaceable class="parameter">DebugLevel</replaceable> ]
|
|
||||||
[ -h <replaceable class="parameter">hostname</replaceable> ] [ -i ]
|
|
||||||
[ -k <replaceable class="parameter">path</replaceable> ] [ -l ]
|
|
||||||
[ -o <replaceable class="parameter">BackendOptions</replaceable> ] [ -p <replaceable class="parameter">port</replaceable> ] [ -n | -s ]
|
|
||||||
</synopsis>
|
|
||||||
|
|
||||||
<refsect2 id="R2-APP-POSTMASTER-1">
|
<refnamediv>
|
||||||
<refsect2info>
|
<refname id="postmaster-ref">postmaster</refname>
|
||||||
<date>1999-05-19</date>
|
<refpurpose><productname>PostgreSQL</productname> multi-user database server</refpurpose>
|
||||||
</refsect2info>
|
</refnamediv>
|
||||||
<title>
|
|
||||||
Inputs
|
<refsynopsisdiv>
|
||||||
</title>
|
<cmdsynopsis>
|
||||||
|
<command>postmaster</command>
|
||||||
|
<arg>-A <group choice="plain"><arg>0</arg><arg>1</arg></group></arg>
|
||||||
|
<arg>-B <replaceable>nbuffers</replaceable></arg>
|
||||||
|
<arg>-c <replaceable>name</replaceable>=<replaceable>value</replaceable></arg>
|
||||||
|
<arg>-d <replaceable>debug-level</replaceable></arg>
|
||||||
|
<arg>-D <replaceable>datadir</replaceable></arg>
|
||||||
|
<arg>-F</arg>
|
||||||
|
<arg>-h <replaceable>hostname</replaceable></arg>
|
||||||
|
<arg>-i</arg>
|
||||||
|
<arg>-k <replaceable>filename</replaceable></arg>
|
||||||
|
<arg>-l</arg>
|
||||||
|
<arg>-N <replaceable>max-connections</replaceable></arg>
|
||||||
|
<arg>-o <replaceable>extra-options</replaceable></arg>
|
||||||
|
<arg>-p <replaceable>port</replaceable></arg>
|
||||||
|
<arg>-S</arg>
|
||||||
|
<group><arg>-n</arg><arg>-s</arg></group>
|
||||||
|
</cmdsynopsis>
|
||||||
|
</refsynopsisdiv>
|
||||||
|
|
||||||
|
<refsect1>
|
||||||
|
<title>Description</title>
|
||||||
|
|
||||||
|
<para>
|
||||||
|
<application>postmaster</application> is the
|
||||||
|
<productname>PostgreSQL</productname> multi-user database server.
|
||||||
|
In order for a client application to access a database it connects
|
||||||
|
(over a network or locally) to a running
|
||||||
|
<application>postmaster</application>. The
|
||||||
|
<application>postmaster</application> then starts a separate server
|
||||||
|
process (<quote><xref linkend="app-postgres"
|
||||||
|
endterm="app-postgres-title"></quote>) to handle the connection.
|
||||||
|
The postmaster also manages the communication among server
|
||||||
|
processes.
|
||||||
|
</para>
|
||||||
|
|
||||||
|
<para>
|
||||||
|
By default the postmaster starts in the foreground and prints log
|
||||||
|
messages to the standard output. In practical applications the
|
||||||
|
postmaster should be started as a background process, perhaps at
|
||||||
|
boot time.
|
||||||
|
</para>
|
||||||
|
|
||||||
|
<para>
|
||||||
|
One postmaster always manages the data from exactly one database
|
||||||
|
cluster. A database cluster is a collection of databases that is
|
||||||
|
stored at a common file system location. When the postmaster
|
||||||
|
starts it needs to know the location of the database cluster files
|
||||||
|
(<quote>data area</quote>). This is done with the
|
||||||
|
<option>-D</option> invocation option or the <envar>PGDATA</envar>
|
||||||
|
environment variable, there is no default. More than one
|
||||||
|
postmaster process can run on a system at one time, as long as they
|
||||||
|
use different data areas and different port numbers (see below). A
|
||||||
|
data area is created with <xref linkend="app-initdb"
|
||||||
|
endterm="app-initdb-title">.
|
||||||
|
</para>
|
||||||
|
|
||||||
|
<refsect2 id="app-postmaster-options">
|
||||||
|
<title>Options</title>
|
||||||
<para>
|
<para>
|
||||||
<application>postmaster</application> accepts the following command line arguments:
|
<application>postmaster</application> accepts the following
|
||||||
|
command line arguments. For a detailed discussion of the options
|
||||||
|
consult the <citetitle>Administrator's Guide</citetitle>. You can
|
||||||
|
also save typing most of these options by setting up a
|
||||||
|
configuration file.
|
||||||
|
|
||||||
<variablelist>
|
<variablelist>
|
||||||
<varlistentry>
|
<varlistentry>
|
||||||
<term>-B <replaceable class="parameter">nBuffers</replaceable></term>
|
<term>-A 0|1</term>
|
||||||
<listitem>
|
<listitem>
|
||||||
<para>
|
<para>
|
||||||
Sets the number of shared-memory disk buffers for the
|
Enables run-time assert checks, which is a debugging aid to
|
||||||
<application>postmaster</application>
|
detect programming mistakes. This is only available if it was
|
||||||
to allocate for use by the backend server processes that it
|
enabled during compilation. If so, the default is on.
|
||||||
starts. This value defaults to 64 buffers, where each buffer is 8k bytes
|
|
||||||
(or whatever BLCKSZ is set to in src/include/config.h).
|
|
||||||
</para>
|
</para>
|
||||||
</listitem>
|
</listitem>
|
||||||
</varlistentry>
|
</varlistentry>
|
||||||
|
|
||||||
<varlistentry>
|
<varlistentry>
|
||||||
<term>-D <replaceable class="parameter">DataDir</replaceable></term>
|
<term>-B <replaceable class="parameter">nbuffers</replaceable></term>
|
||||||
<listitem>
|
<listitem>
|
||||||
<para>
|
<para>
|
||||||
Specifies the directory to use as the root of the tree of database
|
Sets the number of shared buffers for use by the server
|
||||||
directories. If -D is not given, the default data directory name is
|
processes. This value defaults to 64 buffers, where each
|
||||||
the value of the environment variable
|
buffer is 8 kB.
|
||||||
<envar>PGDATA</envar>.
|
|
||||||
If <envar>PGDATA</envar> is not set, then the directory used is
|
|
||||||
<filename>$POSTGRESHOME/data</filename>.
|
|
||||||
If neither environment variable is set and this command-line
|
|
||||||
option is not specified, the default directory that was
|
|
||||||
set at compile-time is used.
|
|
||||||
</para>
|
</para>
|
||||||
</listitem>
|
</listitem>
|
||||||
</varlistentry>
|
</varlistentry>
|
||||||
|
|
||||||
<varlistentry>
|
<varlistentry>
|
||||||
<term>-N <replaceable class="parameter">maxBackends</replaceable></term>
|
<term>-c <replaceable>name</replaceable>=<replaceable>value</replaceable></term>
|
||||||
<listitem>
|
<listitem>
|
||||||
<para>
|
<para>
|
||||||
Sets the maximum number of backend server processes that this postmaster
|
Sets a named run-time parameter. Consult the
|
||||||
is allowed to start. By default, this value is 32, but it can be set
|
<citetitle>Administrator's Guide</citetitle> for a list and
|
||||||
as high as 1024 if your system will support that many processes.
|
descriptions. Most of the other command line options are in
|
||||||
(Note that -B is required to be at least twice -N, so you'll need to
|
fact short forms of such a parameter assignment.
|
||||||
increase -B if you increase -N.)
|
</para>
|
||||||
Both the default and upper limit values for -N can be altered
|
|
||||||
when building <productname>Postgres</productname>
|
<para>
|
||||||
(see src/include/config.h).
|
On some systems it is also possible to equivalently use
|
||||||
|
GNU-style long options in the form
|
||||||
|
<literal>--name=value</literal>.
|
||||||
|
</para>
|
||||||
|
</listitem>
|
||||||
|
</varlistentry>
|
||||||
|
|
||||||
|
<varlistentry>
|
||||||
|
<term>-d <replaceable>debug-level</replaceable></term>
|
||||||
|
<listitem>
|
||||||
|
<para>
|
||||||
|
Sets the debug level. The higher this value is set, the more
|
||||||
|
debugging output is written to the server log. The default is
|
||||||
|
0, which means no debugging. Values up to 4 make sense.
|
||||||
|
</para>
|
||||||
|
</listitem>
|
||||||
|
</varlistentry>
|
||||||
|
|
||||||
|
<varlistentry>
|
||||||
|
<term>-D <replaceable class="parameter">datadir</replaceable></term>
|
||||||
|
<listitem>
|
||||||
|
<para>
|
||||||
|
Specifies the file system location of the data directory. See
|
||||||
|
discussion above.
|
||||||
|
</para>
|
||||||
|
</listitem>
|
||||||
|
</varlistentry>
|
||||||
|
|
||||||
|
<varlistentry>
|
||||||
|
<term>-F</term>
|
||||||
|
<listitem>
|
||||||
|
<para>
|
||||||
|
Disables <function>fsync</function> calls for performance
|
||||||
|
improvement at the risk of data corruption. Read the detailed
|
||||||
|
documentation before using this!
|
||||||
|
</para>
|
||||||
|
</listitem>
|
||||||
|
</varlistentry>
|
||||||
|
|
||||||
|
<varlistentry>
|
||||||
|
<term>-h <replaceable class="parameter">hostname</replaceable></term>
|
||||||
|
<listitem>
|
||||||
|
<para>
|
||||||
|
Specifies the TCP/IP hostname or address on which the
|
||||||
|
<application>postmaster</application> is to listen for
|
||||||
|
connections from client applications. Defaults to the value
|
||||||
|
of the <envar>PGHOST</envar> environment variable, or if
|
||||||
|
<envar>PGHOST</envar> is not set, it defaults to listening on
|
||||||
|
all configured addresses (including localhost).
|
||||||
|
</para>
|
||||||
|
</listitem>
|
||||||
|
</varlistentry>
|
||||||
|
|
||||||
|
<varlistentry>
|
||||||
|
<term>-i</term>
|
||||||
|
<listitem>
|
||||||
|
<para>
|
||||||
|
Allows clients to connect via TCP/IP (Internet domain)
|
||||||
|
connections. Without this option, only local Unix domain
|
||||||
|
socket connections are accepted.
|
||||||
|
</para>
|
||||||
|
</listitem>
|
||||||
|
</varlistentry>
|
||||||
|
|
||||||
|
<varlistentry>
|
||||||
|
<term>-k <replaceable class="parameter">filename</replaceable></term>
|
||||||
|
<listitem>
|
||||||
|
<para>
|
||||||
|
Specifies the Unix domain socket file name on which the
|
||||||
|
<application>postmaster</application> is to listen for
|
||||||
|
connections from client applications. Defaults to the value
|
||||||
|
of the <envar>PGUNIXSOCKET</envar> environment variable, or if
|
||||||
|
<envar>PGUNIXSOCKET</envar> is not set, then defaults to a
|
||||||
|
file in <filename>/tmp</filename> constructed from the port
|
||||||
|
number.
|
||||||
|
</para>
|
||||||
|
</listitem>
|
||||||
|
</varlistentry>
|
||||||
|
|
||||||
|
<varlistentry>
|
||||||
|
<term>-l</term>
|
||||||
|
<listitem>
|
||||||
|
<para>
|
||||||
|
Enables secure connections using SSL. The <option>-i</option>
|
||||||
|
option is also required. You must have compiled with SSL
|
||||||
|
enabled to use this option.
|
||||||
|
</para>
|
||||||
|
</listitem>
|
||||||
|
</varlistentry>
|
||||||
|
|
||||||
|
<varlistentry>
|
||||||
|
<term>-N <replaceable class="parameter">max-connections</replaceable></term>
|
||||||
|
<listitem>
|
||||||
|
<para>
|
||||||
|
Sets the maximum number of client connections that this
|
||||||
|
postmaster will accept. By default, this value is 32, but it
|
||||||
|
can be set as high as 1024 if your system will support that
|
||||||
|
many processes. (Note that <option>-B</option> is required to
|
||||||
|
be at least twice <option>-N</option>.)
|
||||||
|
</para>
|
||||||
|
</listitem>
|
||||||
|
</varlistentry>
|
||||||
|
|
||||||
|
<varlistentry>
|
||||||
|
<term>-o <replaceable class="parameter">extra-options</replaceable></term>
|
||||||
|
<listitem>
|
||||||
|
<para>
|
||||||
|
The command line-style options specified in <replaceable
|
||||||
|
class="parameter">EXTRA-OPTIONS</replaceable> are passed to
|
||||||
|
all backend server processes started by this
|
||||||
|
<application>postmaster</application>. See <xref
|
||||||
|
linkend="app-postgres" endterm="app-postgres-title"> for
|
||||||
|
possibilities. If the option string contains any spaces, the
|
||||||
|
entire string must be quoted.
|
||||||
|
</para>
|
||||||
|
</listitem>
|
||||||
|
</varlistentry>
|
||||||
|
|
||||||
|
<varlistentry>
|
||||||
|
<term>-p <replaceable class="parameter">port</replaceable></term>
|
||||||
|
<listitem>
|
||||||
|
<para>
|
||||||
|
Specifies the TCP/IP port or local Unix domain socket file
|
||||||
|
extension on which the <application>postmaster</application>
|
||||||
|
is to listen for connections from client applications.
|
||||||
|
Defaults to the value of the <envar>PGPORT</envar> environment
|
||||||
|
variable, or if <envar>PGPORT</envar> is not set, then
|
||||||
|
defaults to the value established during compilation (normally
|
||||||
|
5432). If you specify a port other than the default port,
|
||||||
|
then all client applications must specify the same port using
|
||||||
|
either command-line options or <envar>PGPORT</envar>.
|
||||||
</para>
|
</para>
|
||||||
</listitem>
|
</listitem>
|
||||||
</varlistentry>
|
</varlistentry>
|
||||||
@ -92,171 +260,36 @@ postmaster [ -B <replaceable class="parameter">nBuffers</replaceable> ] [ -D <re
|
|||||||
<listitem>
|
<listitem>
|
||||||
<para>
|
<para>
|
||||||
Specifies that the <application>postmaster</application>
|
Specifies that the <application>postmaster</application>
|
||||||
process should start up in silent mode. That is, it will disassociate
|
process should start up in silent mode. That is, it will
|
||||||
from the user's (controlling) tty, start its own process group, and
|
disassociate from the user's (controlling) terminal, start its
|
||||||
redirect its standard output and standard error to
|
own process group, and redirect its standard output and
|
||||||
<filename>/dev/null</filename>.
|
standard error to <filename>/dev/null</filename>.
|
||||||
</para>
|
</para>
|
||||||
<para>
|
<para>
|
||||||
<emphasis>Note</emphasis> that using this switch makes it very
|
Using this switch discards all logging output, which is
|
||||||
difficult to troubleshoot problems, since all tracing and logging
|
probably not what you want, since it makes it very difficult
|
||||||
output that would normally be generated by this postmaster and its
|
to troubleshoot problems. See below for a better way to start
|
||||||
child backends will be discarded.
|
the postmaster in the background.
|
||||||
</para>
|
</para>
|
||||||
</listitem>
|
</listitem>
|
||||||
</varlistentry>
|
</varlistentry>
|
||||||
|
|
||||||
<varlistentry>
|
|
||||||
<term>-d <replaceable class="parameter">DebugLevel</replaceable></term>
|
|
||||||
<listitem>
|
|
||||||
<para>
|
|
||||||
Determines the amount of debugging output the backend servers will
|
|
||||||
produce.
|
|
||||||
If <replaceable class="parameter">DebugLevel</replaceable>
|
|
||||||
is one, the postmaster will trace all connection traffic.
|
|
||||||
Levels two and higher turn on increasing amounts of debug output
|
|
||||||
from the backend processes, and the postmaster
|
|
||||||
displays more information
|
|
||||||
including the backend environment and process traffic.
|
|
||||||
Note that unless the postmaster's standard output and standard error
|
|
||||||
are redirected into a log file, all this output will appear on the
|
|
||||||
controlling tty of the <application>postmaster</application>.
|
|
||||||
</para>
|
|
||||||
</listitem>
|
|
||||||
</varlistentry>
|
|
||||||
|
|
||||||
<varlistentry>
|
|
||||||
<term>-h <replaceable class="parameter">hostName</replaceable></term>
|
|
||||||
<listitem>
|
|
||||||
<para>
|
|
||||||
Specifies the TCP/IP hostname or address
|
|
||||||
on which the <application>postmaster</application>
|
|
||||||
is to listen for connections from frontend applications. Defaults to
|
|
||||||
the value of the <envar>PGHOST</envar>
|
|
||||||
environment variable, or if <envar>PGHOST</envar>
|
|
||||||
is not set, it defaults to listening on all configured addresses
|
|
||||||
(including localhost).
|
|
||||||
</para>
|
|
||||||
<para>
|
|
||||||
If you use a hostname do not try to run
|
|
||||||
multiple instances of <application>postmaster</application> on the
|
|
||||||
same IP address but different ports. Doing so will result in them
|
|
||||||
attempting (incorrectly) to use the same shared memory segments.
|
|
||||||
Also, if you use a hostname, all of the host's IP addresses
|
|
||||||
on which <application>postmaster</application> instances are
|
|
||||||
listening must be distinct in the two last octets.
|
|
||||||
</para>
|
|
||||||
<para>
|
|
||||||
If you don't use this option, each instance must listen on a
|
|
||||||
different port (via -p or <envar>PGPORT</envar>). And, of course, do
|
|
||||||
not try to use both approaches on one host.
|
|
||||||
</para>
|
|
||||||
</listitem>
|
|
||||||
</varlistentry>
|
|
||||||
|
|
||||||
<varlistentry>
|
|
||||||
<term>-i</term>
|
|
||||||
<listitem>
|
|
||||||
<para>
|
|
||||||
Allows clients to connect via TCP/IP (Internet domain) connections.
|
|
||||||
Without this option, only local Unix domain socket connections are
|
|
||||||
accepted.
|
|
||||||
</para>
|
|
||||||
</listitem>
|
|
||||||
</varlistentry>
|
|
||||||
|
|
||||||
<varlistentry>
|
|
||||||
<term>-k <replaceable class="parameter">path</replaceable></term>
|
|
||||||
<listitem>
|
|
||||||
<para>
|
|
||||||
Specifies the local Unix domain socket path name
|
|
||||||
on which the <application>postmaster</application>
|
|
||||||
is to listen for connections from frontend applications. Defaults to
|
|
||||||
the value of the
|
|
||||||
<envar>PGUNIXSOCKET</envar>
|
|
||||||
environment variable, or if <envar>PGUNIXSOCKET</envar>
|
|
||||||
is not set, then defaults to a file in <filename>/tmp</filename>
|
|
||||||
constructed from the port number.
|
|
||||||
</para>
|
|
||||||
<para>
|
|
||||||
You can use this option to put the Unix-domain socket in a
|
|
||||||
directory that is private to one or more users using Unix
|
|
||||||
directory permissions. This is necessary for securely
|
|
||||||
creating databases automatically on shared machines.
|
|
||||||
In that situation, also disallow all TCP/IP connections
|
|
||||||
initially in <filename>pg_hba.conf</filename>.
|
|
||||||
If you specify a socket path other than the
|
|
||||||
default then all frontend applications (including
|
|
||||||
<application>psql</application>) must specify the same
|
|
||||||
socket path using either command-line options or
|
|
||||||
<envar>PGUNIXSOCKET</envar>.
|
|
||||||
</para>
|
|
||||||
</listitem>
|
|
||||||
</varlistentry>
|
|
||||||
|
|
||||||
<varlistentry>
|
|
||||||
<term>-l</term>
|
|
||||||
<listitem>
|
|
||||||
<para>
|
|
||||||
Enables secure connections using SSL. The <option>-i</option> option
|
|
||||||
is also required.
|
|
||||||
You must have compiled with SSL enabled to use this option.
|
|
||||||
</para>
|
|
||||||
</listitem>
|
|
||||||
</varlistentry>
|
|
||||||
|
|
||||||
<varlistentry>
|
|
||||||
<term>-o <replaceable class="parameter">BackendOptions</replaceable></term>
|
|
||||||
<listitem>
|
|
||||||
<para>
|
|
||||||
The
|
|
||||||
<literal>postgres</literal>
|
|
||||||
option(s) specified in
|
|
||||||
<replaceable class="parameter">BackendOptions</replaceable>
|
|
||||||
are passed to all backend server processes started by this
|
|
||||||
<application>postmaster</application>.
|
|
||||||
If the option string contains any spaces, the entire string must be
|
|
||||||
quoted.
|
|
||||||
</para>
|
|
||||||
</listitem>
|
|
||||||
</varlistentry>
|
|
||||||
|
|
||||||
<varlistentry>
|
|
||||||
<term>-p <replaceable class="parameter">port</replaceable></term>
|
|
||||||
<listitem>
|
|
||||||
<para>
|
|
||||||
Specifies the TCP/IP port or local Unix domain socket file extension
|
|
||||||
on which the <application>postmaster</application>
|
|
||||||
is to listen for connections from frontend applications. Defaults to
|
|
||||||
the value of the
|
|
||||||
<envar>PGPORT</envar>
|
|
||||||
environment variable, or if <envar>PGPORT</envar>
|
|
||||||
is not set, then defaults to the value established when Postgres was
|
|
||||||
compiled (normally 5432). If you specify a port other than the
|
|
||||||
default port, then all frontend applications (including
|
|
||||||
<application>psql</application>) must specify the same
|
|
||||||
port using either command-line options or
|
|
||||||
<envar>PGPORT</envar>.
|
|
||||||
</para>
|
|
||||||
</listitem>
|
|
||||||
</varlistentry>
|
|
||||||
</variablelist>
|
</variablelist>
|
||||||
</para>
|
</para>
|
||||||
|
|
||||||
<para>
|
<para>
|
||||||
Two additional command line options are available for debugging problems
|
Two additional command line options are available for debugging
|
||||||
that cause a backend to die abnormally.
|
problems that cause a backend to die abnormally. These options
|
||||||
These options control the behavior of the
|
control the behavior of the <application>postmaster</application>
|
||||||
<application>postmaster</application> in this situation, and
|
in this situation, and <emphasis>neither option is intended for
|
||||||
<emphasis>neither option is intended for use in
|
use in ordinary operation</emphasis>.
|
||||||
ordinary operation</emphasis>.
|
|
||||||
</para>
|
</para>
|
||||||
|
|
||||||
<para>
|
<para>
|
||||||
The ordinary strategy for this situation is to notify all other
|
The ordinary strategy for this situation is to notify all other
|
||||||
backends that they must terminate and then reinitialize the shared
|
backends that they must terminate and then reinitialize the shared
|
||||||
memory and semaphores. This is because an errant backend could have
|
memory and semaphores. This is because an errant backend could
|
||||||
corrupted some shared state before terminating.
|
have corrupted some shared state before terminating.
|
||||||
</para>
|
</para>
|
||||||
|
|
||||||
<para>
|
<para>
|
||||||
@ -292,31 +325,12 @@ postmaster [ -B <replaceable class="parameter">nBuffers</replaceable> ] [ -D <re
|
|||||||
</refsect2>
|
</refsect2>
|
||||||
|
|
||||||
<refsect2 id="R2-APP-POSTMASTER-2">
|
<refsect2 id="R2-APP-POSTMASTER-2">
|
||||||
<refsect2info>
|
|
||||||
<date>1999-05-19</date>
|
|
||||||
</refsect2info>
|
|
||||||
<title>
|
<title>
|
||||||
Outputs
|
Outputs
|
||||||
</title>
|
</title>
|
||||||
<para>
|
<para>
|
||||||
|
|
||||||
<variablelist>
|
<variablelist>
|
||||||
<!--
|
|
||||||
<varlistentry>
|
|
||||||
<term>
|
|
||||||
FindBackend: could not find a backend to execute...
|
|
||||||
</term>
|
|
||||||
<listitem>
|
|
||||||
<para>
|
|
||||||
If you see this message, you do not have the
|
|
||||||
<application>postgres</application>
|
|
||||||
executable in your path. Add the directory in which
|
|
||||||
<application>postgres</application> resides to
|
|
||||||
your path.
|
|
||||||
</para>
|
|
||||||
</listitem>
|
|
||||||
</varlistentry>
|
|
||||||
-->
|
|
||||||
<varlistentry>
|
<varlistentry>
|
||||||
<term><computeroutput>
|
<term><computeroutput>
|
||||||
semget: No space left on device
|
semget: No space left on device
|
||||||
@ -416,124 +430,65 @@ IpcMemoryAttach: shmat() failed: Permission denied
|
|||||||
</variablelist>
|
</variablelist>
|
||||||
</para>
|
</para>
|
||||||
</refsect2>
|
</refsect2>
|
||||||
</refsynopsisdiv>
|
|
||||||
|
|
||||||
<refsect1 id="R1-APP-POSTMASTER-1">
|
|
||||||
<refsect1info>
|
|
||||||
<date>1999-05-19</date>
|
|
||||||
</refsect1info>
|
|
||||||
<title>
|
|
||||||
Description
|
|
||||||
</title>
|
|
||||||
|
|
||||||
<para>
|
|
||||||
<application>postmaster</application>
|
|
||||||
manages the communication between frontend and backend processes, as
|
|
||||||
well as allocating the shared buffer pool and SysV semaphores
|
|
||||||
(on machines without a test-and-set instruction).
|
|
||||||
<application>postmaster</application>
|
|
||||||
does not itself interact with the user and should be started as a
|
|
||||||
background process.
|
|
||||||
</para>
|
|
||||||
|
|
||||||
<para>
|
|
||||||
<emphasis>Only one postmaster should be running at a time in a given
|
|
||||||
<productname>Postgres</productname> installation.</emphasis>
|
|
||||||
Here, an installation means a database directory and
|
|
||||||
<application>postmaster</application> port number.
|
|
||||||
You can run more than one postmaster on a machine only if each one has a
|
|
||||||
separate directory and port number.
|
|
||||||
</para>
|
|
||||||
</refsect1>
|
</refsect1>
|
||||||
|
|
||||||
<refsect1 id="R1-APP-POSTMASTER-2">
|
<refsect1>
|
||||||
<refsect1info>
|
<title>Notes</title>
|
||||||
<date>1998-10-04</date>
|
|
||||||
</refsect1info>
|
|
||||||
<title>
|
|
||||||
Notes
|
|
||||||
</title>
|
|
||||||
|
|
||||||
<para>
|
<para>
|
||||||
If at all possible,
|
If at all possible, <emphasis>do not</emphasis> use
|
||||||
<emphasis>do not</emphasis>
|
<literal>SIGKILL</literal> to kill the
|
||||||
use <literal>SIGKILL</literal>
|
<application>postmaster</application>. This will prevent
|
||||||
when killing the <application>postmaster</application>.
|
<application>postmaster</application> from freeing the system
|
||||||
<literal>SIGHUP</literal>,
|
resources (e.g., shared memory and semaphores) that it holds before
|
||||||
<literal>SIGINT</literal>,
|
terminating.
|
||||||
or
|
|
||||||
<literal>SIGTERM</literal>
|
|
||||||
(the default signal for
|
|
||||||
<application>kill</application>(1))"
|
|
||||||
should be used instead. Using
|
|
||||||
|
|
||||||
<programlisting>
|
|
||||||
$ kill -KILL
|
|
||||||
</programlisting>
|
|
||||||
|
|
||||||
or its alternative form
|
|
||||||
|
|
||||||
<programlisting>
|
|
||||||
$ kill -9
|
|
||||||
</programlisting>
|
|
||||||
|
|
||||||
will prevent <application>postmaster</application>
|
|
||||||
from freeing the system resources (e.g., shared memory and semaphores)
|
|
||||||
that it holds before dying. Use <literal>SIGTERM</literal> instead
|
|
||||||
to avoid having to clean up manually (as described earlier).
|
|
||||||
</para>
|
</para>
|
||||||
|
|
||||||
<para>
|
<para>
|
||||||
Useful utilities for dealing with shared memory problems include
|
To terminate the postmaster normally, the signals
|
||||||
<application>ipcs(1)</application>,
|
<literal>SIGTERM</literal>, <literal>SIGINT</literal>, or
|
||||||
<application>ipcrm(1</application>), and
|
<literal>SIGQUIT</literal> can be used. The first will wait for
|
||||||
<application>ipcclean(1)</application>.
|
all clients to terminate before quitting, the second will
|
||||||
|
forcefully disconnect all clients, and the third will quit
|
||||||
|
immediately without lengthy shutdown, resulting in a recovery run
|
||||||
|
during restart.
|
||||||
|
</para>
|
||||||
|
|
||||||
|
<para>
|
||||||
|
The utility command <xref linkend="app-pg-ctl"> can be used to
|
||||||
|
start and shut down the postmaster safely and comfortably.
|
||||||
</para>
|
</para>
|
||||||
</refsect1>
|
</refsect1>
|
||||||
|
|
||||||
<refsect1 id="R1-APP-POSTMASTER-3">
|
<refsect1 id="app-postmaster-usage">
|
||||||
<refsect1info>
|
<title>Usage</title>
|
||||||
<date>1998-10-04</date>
|
|
||||||
</refsect1info>
|
|
||||||
<title>
|
|
||||||
Usage
|
|
||||||
</title>
|
|
||||||
<para>
|
<para>
|
||||||
To start <application>postmaster</application> using default
|
To start <application>postmaster</application> in the background
|
||||||
values, type:
|
using default values, type:
|
||||||
|
|
||||||
<programlisting>
|
<screen>
|
||||||
$ nohup postmaster >logfile 2>&1 &
|
<prompt>$</prompt> <userinput>nohup postmaster >logfile 2>&1 </dev/null &</userinput>
|
||||||
</programlisting>
|
</screen>
|
||||||
|
|
||||||
This command will start up <application>postmaster</application>
|
|
||||||
on the default port (5432). This is the
|
|
||||||
simplest and most common way to start the
|
|
||||||
<application>postmaster</application>.
|
|
||||||
</para>
|
</para>
|
||||||
|
|
||||||
<para>
|
<para>
|
||||||
To start <application>postmaster</application> with a specific port:
|
To start <application>postmaster</application> with a specific
|
||||||
|
port:
|
||||||
<programlisting>
|
<screen>
|
||||||
$ nohup postmaster -p 1234 &
|
<prompt>$</prompt> <userinput>postmaster -p 1234</userinput>
|
||||||
</programlisting>
|
</screen>
|
||||||
|
|
||||||
This command will start up <application>postmaster</application>
|
This command will start up <application>postmaster</application>
|
||||||
communicating through the port 1234. In order to
|
communicating through the port 1234. In order to connect to this
|
||||||
connect to this <application>postmaster</application>
|
<application>postmaster</application> using psql, you would need to
|
||||||
using psql, you would need to run it as
|
run it as
|
||||||
|
<screen>
|
||||||
<programlisting>
|
<prompt>$</prompt> <userinput>psql -p 1234</userinput>
|
||||||
$ psql -p 1234
|
</screen>
|
||||||
</programlisting>
|
|
||||||
|
|
||||||
or set the environment variable <envar>PGPORT</envar>:
|
or set the environment variable <envar>PGPORT</envar>:
|
||||||
|
<screen>
|
||||||
<programlisting>
|
<prompt>$</prompt> <userinput>export PGPORT=1234</userinput>
|
||||||
$ export PGPORT 1234
|
<prompt>$</prompt> <userinput>psql</userinput>
|
||||||
$ psql
|
</screen>
|
||||||
</programlisting>
|
|
||||||
</para>
|
</para>
|
||||||
</refsect1>
|
</refsect1>
|
||||||
</refentry>
|
</refentry>
|
||||||
|
|||||||
@ -1,5 +1,5 @@
|
|||||||
<!--
|
<!--
|
||||||
$Header: /cvsroot/pgsql/doc/src/sgml/runtime.sgml,v 1.34 2000/11/13 21:35:02 momjian Exp $
|
$Header: /cvsroot/pgsql/doc/src/sgml/runtime.sgml,v 1.35 2000/11/14 18:11:30 petere Exp $
|
||||||
-->
|
-->
|
||||||
|
|
||||||
<Chapter Id="runtime">
|
<Chapter Id="runtime">
|
||||||
@ -930,7 +930,34 @@ env PGOPTIONS='-c geqo=off' psql
|
|||||||
</varlistentry>
|
</varlistentry>
|
||||||
|
|
||||||
<varlistentry>
|
<varlistentry>
|
||||||
<term>KRB_SERVER_KEYFILE</>
|
<term>HOSTNAME (<type>string</type>)</term>
|
||||||
|
<listitem>
|
||||||
|
<para>
|
||||||
|
Specifies the TCP/IP hostname or address on which the
|
||||||
|
<application>postmaster</application> is to listen for
|
||||||
|
connections from client applications. Defaults to the value
|
||||||
|
of the <envar>PGHOST</envar> environment variable, or if
|
||||||
|
<envar>PGHOST</envar> is not set, it defaults to listening on
|
||||||
|
all configured addresses (including localhost).
|
||||||
|
</para>
|
||||||
|
<para>
|
||||||
|
If you use a hostname do not try to run multiple instances of
|
||||||
|
<application>postmaster</application> on the same IP address
|
||||||
|
but different ports. Doing so will result in them attempting
|
||||||
|
(incorrectly) to use the same shared memory segments. Also,
|
||||||
|
if you use a hostname, all of the host's IP addresses on which
|
||||||
|
<application>postmaster</application> instances are listening
|
||||||
|
must be distinct in the two last octets.
|
||||||
|
</para>
|
||||||
|
<para>
|
||||||
|
If you do not use this option, then each instance must listen
|
||||||
|
on a different port.
|
||||||
|
</para>
|
||||||
|
</listitem>
|
||||||
|
</varlistentry>
|
||||||
|
|
||||||
|
<varlistentry>
|
||||||
|
<term>KRB_SERVER_KEYFILE (<type>string</type>)</term>
|
||||||
<listitem>
|
<listitem>
|
||||||
<para>
|
<para>
|
||||||
Sets the location of the Kerberos server key file. See
|
Sets the location of the Kerberos server key file. See
|
||||||
@ -1056,6 +1083,21 @@ env PGOPTIONS='-c geqo=off' psql
|
|||||||
</listitem>
|
</listitem>
|
||||||
</varlistentry>
|
</varlistentry>
|
||||||
|
|
||||||
|
<varlistentry>
|
||||||
|
<term>UNIXSOCKET (<type>string</type>)</term>
|
||||||
|
<listitem>
|
||||||
|
<para>
|
||||||
|
Specifies the Unix domain socket file name on which the
|
||||||
|
<application>postmaster</application> is to listen for
|
||||||
|
connections from client applications. Defaults to the value
|
||||||
|
of the <envar>PGUNIXSOCKET</envar> environment variable, or if
|
||||||
|
<envar>PGUNIXSOCKET</envar> is not set, then defaults to a
|
||||||
|
file in <filename>/tmp</filename> constructed from the port
|
||||||
|
number.
|
||||||
|
</para>
|
||||||
|
</listitem>
|
||||||
|
</varlistentry>
|
||||||
|
|
||||||
<varlistentry>
|
<varlistentry>
|
||||||
<term>UNIX_SOCKET_GROUP (<type>string</type>)</term>
|
<term>UNIX_SOCKET_GROUP (<type>string</type>)</term>
|
||||||
<listitem>
|
<listitem>
|
||||||
|
|||||||
@ -11,7 +11,7 @@
|
|||||||
*
|
*
|
||||||
*
|
*
|
||||||
* IDENTIFICATION
|
* IDENTIFICATION
|
||||||
* $Header: /cvsroot/pgsql/src/backend/postmaster/postmaster.c,v 1.185 2000/11/14 01:15:01 momjian Exp $
|
* $Header: /cvsroot/pgsql/src/backend/postmaster/postmaster.c,v 1.186 2000/11/14 18:11:31 petere Exp $
|
||||||
*
|
*
|
||||||
* NOTES
|
* NOTES
|
||||||
*
|
*
|
||||||
@ -790,30 +790,30 @@ static void
|
|||||||
usage(const char *progname)
|
usage(const char *progname)
|
||||||
{
|
{
|
||||||
printf("%s is the PostgreSQL server.\n\n", progname);
|
printf("%s is the PostgreSQL server.\n\n", progname);
|
||||||
printf("Usage:\n %s [options]\n\n", progname);
|
printf("Usage:\n %s [options...]\n\n", progname);
|
||||||
printf("Options:\n");
|
printf("Options:\n");
|
||||||
#ifdef USE_ASSERT_CHECKING
|
#ifdef USE_ASSERT_CHECKING
|
||||||
printf(" -A 1|0 enable/disable runtime assert checking\n");
|
printf(" -A 1|0 enable/disable run-time assert checking\n");
|
||||||
#endif
|
#endif
|
||||||
printf(" -B <buffers> number of shared buffers\n");
|
printf(" -B NBUFFERS number of shared buffers (default %d)\n", DEF_NBUFFERS);
|
||||||
printf(" -c <name>=<value> set run-time parameter\n");
|
printf(" -c NAME=VALUE set run-time parameter\n");
|
||||||
printf(" -d 1-5 debugging level\n");
|
printf(" -d 1-5 debugging level\n");
|
||||||
printf(" -D <directory> database directory\n");
|
printf(" -D DATADIR database directory\n");
|
||||||
printf(" -F turn fsync off\n");
|
printf(" -F turn fsync off\n");
|
||||||
printf(" -h hostname specify hostname or IP address\n");
|
printf(" -h HOSTNAME host name or IP address to listen to\n");
|
||||||
printf(" -i enable TCP/IP connections\n");
|
printf(" -i enable TCP/IP connections\n");
|
||||||
printf(" -k path specify Unix-domain socket name\n");
|
printf(" -k FILENAME Unix domain socket location\n");
|
||||||
#ifdef USE_SSL
|
#ifdef USE_SSL
|
||||||
printf(" -l enable SSL connections\n");
|
printf(" -l enable SSL connections\n");
|
||||||
#endif
|
#endif
|
||||||
printf(" -N <number> maximum number of allowed connections (1..%d, default %d)\n",
|
printf(" -N MAX-CONNECT maximum number of allowed connections (1..%d, default %d)\n",
|
||||||
MAXBACKENDS, DEF_MAXBACKENDS);
|
MAXBACKENDS, DEF_MAXBACKENDS);
|
||||||
printf(" -o <option> pass 'option' to each backend server\n");
|
printf(" -o OPTIONS pass 'OPTIONS' to each backend server\n");
|
||||||
printf(" -p <port> port number to listen on\n");
|
printf(" -p PORT port number to listen on (default %d)\n", DEF_PGPORT);
|
||||||
printf(" -S silent mode (dissociate from tty)\n");
|
printf(" -S silent mode (start in background without logging output)\n");
|
||||||
|
|
||||||
printf("\nDeveloper options:\n");
|
printf("\nDeveloper options:\n");
|
||||||
printf(" -n don't reinitialize shared memory after abnormal exit\n");
|
printf(" -n do not reinitialize shared memory after abnormal exit\n");
|
||||||
printf(" -s send SIGSTOP to all backend servers if one dies\n");
|
printf(" -s send SIGSTOP to all backend servers if one dies\n");
|
||||||
|
|
||||||
printf("\nPlease read the documentation for the complete list of run-time\n"
|
printf("\nPlease read the documentation for the complete list of run-time\n"
|
||||||
|
|||||||
@ -8,7 +8,7 @@
|
|||||||
*
|
*
|
||||||
*
|
*
|
||||||
* IDENTIFICATION
|
* IDENTIFICATION
|
||||||
* $Header: /cvsroot/pgsql/src/backend/tcop/postgres.c,v 1.187 2000/11/08 17:57:46 petere Exp $
|
* $Header: /cvsroot/pgsql/src/backend/tcop/postgres.c,v 1.188 2000/11/14 18:11:32 petere Exp $
|
||||||
*
|
*
|
||||||
* NOTES
|
* NOTES
|
||||||
* this is the "main" module of the postgres backend and
|
* this is the "main" module of the postgres backend and
|
||||||
@ -1001,38 +1001,41 @@ SigHupHandler(SIGNAL_ARGS)
|
|||||||
}
|
}
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
static void
|
static void
|
||||||
usage(char *progname)
|
usage(char *progname)
|
||||||
{
|
{
|
||||||
fprintf(stderr,
|
printf("%s is the PostgreSQL stand-alone backend. It is not\nintended to be used by normal users.\n\n", progname);
|
||||||
"Usage: %s [options] [dbname]\n", progname);
|
|
||||||
|
printf("Usage:\n %s [options...] [dbname]\n\n", progname);
|
||||||
|
printf("Options:\n");
|
||||||
#ifdef USE_ASSERT_CHECKING
|
#ifdef USE_ASSERT_CHECKING
|
||||||
fprintf(stderr, "\t-A on\t\tenable/disable assert checking\n");
|
printf(" -A 1|0 enable/disable run-time assert checking\n");
|
||||||
#endif
|
#endif
|
||||||
fprintf(stderr, "\t-B buffers\tset number of buffers in buffer pool\n");
|
printf(" -B NBUFFERS number of shared buffers (default %d)\n", DEF_NBUFFERS);
|
||||||
fprintf(stderr, "\t-c name=value\tset run-time parameter\n");
|
printf(" -c NAME=VALUE set run-time parameter\n");
|
||||||
fprintf(stderr, "\t-C \t\tsuppress version info\n");
|
printf(" -d 1-5 debugging level\n");
|
||||||
fprintf(stderr, "\t-D dir\t\tdata directory\n");
|
printf(" -D DATADIR database directory\n");
|
||||||
fprintf(stderr, "\t-E \t\techo query before execution\n");
|
printf(" -e use European date format\n");
|
||||||
fprintf(stderr, "\t-F \t\tturn fsync off\n");
|
printf(" -E echo query before execution\n");
|
||||||
fprintf(stderr, "\t-L \t\tturn off locking\n");
|
printf(" -F turn fsync off\n");
|
||||||
fprintf(stderr, "\t-N \t\tdon't use newline as interactive query delimiter\n");
|
printf(" -N do not use newline as interactive query delimiter\n");
|
||||||
fprintf(stderr, "\t-O \t\tallow system table structure changes\n");
|
printf(" -o FILENAME send stdout and stderr to given file\n");
|
||||||
fprintf(stderr, "\t-Q \t\tsuppress informational messages\n");
|
printf(" -P disable system indexes\n");
|
||||||
fprintf(stderr, "\t-S kbytes\tset amount of memory for sorts (in kbytes)\n");
|
printf(" -s show statistics after each query\n");
|
||||||
fprintf(stderr, "\t-T options\tspecify pg_options\n");
|
printf(" -S SORT-MEM set amount of memory for sorts (in kbytes)\n");
|
||||||
fprintf(stderr, "\t-W sec\t\twait N seconds to allow attach from a debugger\n");
|
printf("Developer options:\n");
|
||||||
fprintf(stderr, "\t-d [1-5]\tset debug level\n");
|
printf(" -f [s|i|n|m|h] forbid use of some plan types\n");
|
||||||
fprintf(stderr, "\t-e \t\tturn on European date format\n");
|
printf(" -i do not execute queries\n");
|
||||||
fprintf(stderr, "\t-f [s|i|n|m|h]\tforbid use of some plan types\n");
|
printf(" -L turn off locking\n");
|
||||||
fprintf(stderr, "\t-i \t\tdon't execute queries\n");
|
printf(" -O allow system table structure changes\n");
|
||||||
fprintf(stderr, "\t-o file\t\tsend stdout and stderr to given filename\n");
|
printf(" -t [pa|pl|ex] show timings after each query\n");
|
||||||
fprintf(stderr, "\t-p database\tbackend is started under a postmaster\n");
|
printf(" -W NUM wait NUM seconds to allow attach from a debugger\n");
|
||||||
fprintf(stderr, "\t-s \t\tshow stats after each query\n");
|
printf("\nReport bugs to <pgsql-bugs@postgresql.org>.\n");
|
||||||
fprintf(stderr, "\t-t [pa|pl|ex]\tshow timings after each query\n");
|
|
||||||
fprintf(stderr, "\t-v version\tset protocol version being used by frontend\n");
|
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
/* ----------------------------------------------------------------
|
/* ----------------------------------------------------------------
|
||||||
* PostgresMain
|
* PostgresMain
|
||||||
* postgres main loop -- all backends, interactive or otherwise start here
|
* postgres main loop -- all backends, interactive or otherwise start here
|
||||||
@ -1646,7 +1649,7 @@ PostgresMain(int argc, char *argv[], int real_argc, char *real_argv[], const cha
|
|||||||
if (!IsUnderPostmaster)
|
if (!IsUnderPostmaster)
|
||||||
{
|
{
|
||||||
puts("\nPOSTGRES backend interactive interface ");
|
puts("\nPOSTGRES backend interactive interface ");
|
||||||
puts("$Revision: 1.187 $ $Date: 2000/11/08 17:57:46 $\n");
|
puts("$Revision: 1.188 $ $Date: 2000/11/14 18:11:32 $\n");
|
||||||
}
|
}
|
||||||
|
|
||||||
/*
|
/*
|
||||||
|
|||||||
Loading…
Reference in New Issue
Block a user