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Document max_standby_delay=-1 option, now that it's allowed again.

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Heikki Linnakangas 2010-02-27 09:29:20 +00:00
parent 4ec700a8ec
commit 7ab9305cc9
2 changed files with 8 additions and 6 deletions
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7
doc/src/sgml/config.sgml
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@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.254 2010/02/25 19:20:38 momjian Exp $ --> <!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.255 2010/02/27 09:29:20 heikki Exp $ -->
<chapter Id="runtime-config"> <chapter Id="runtime-config">
<title>Server Configuration</title> <title>Server Configuration</title>
@ -1868,9 +1868,8 @@ archive_command = 'copy "%p" "C:\\server\\archivedir\\%f"' # Windows
described in <xref linkend="hot-standby-conflict">. Typically, described in <xref linkend="hot-standby-conflict">. Typically,
this parameter makes sense only during replication, so when this parameter makes sense only during replication, so when
performing an archive recovery to recover from data loss a very high performing an archive recovery to recover from data loss a very high
parameter setting is recommended. The default is 30 seconds. parameter setting or -1 which means wait forever is recommended.
There is no wait-forever setting because of the potential for deadlock The default is 30 seconds.
which that setting would introduce.
This parameter can only be set in the <filename>postgresql.conf</> This parameter can only be set in the <filename>postgresql.conf</>
file or on the server command line. file or on the server command line.
</para> </para>

7
doc/src/sgml/high-availability.sgml
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@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/high-availability.sgml,v 1.51 2010/02/25 09:16:42 heikki Exp $ --> <!-- $PostgreSQL: pgsql/doc/src/sgml/high-availability.sgml,v 1.52 2010/02/27 09:29:20 heikki Exp $ -->
<chapter id="high-availability"> <chapter id="high-availability">
<title>High Availability, Load Balancing, and Replication</title> <title>High Availability, Load Balancing, and Replication</title>
@ -1521,7 +1521,10 @@ LOG: database system is ready to accept read only connections
<varname>max_standby_delay</> or even set it to zero, though that is a <varname>max_standby_delay</> or even set it to zero, though that is a
very aggressive setting. If the standby server is tasked as an additional very aggressive setting. If the standby server is tasked as an additional
server for decision support queries then it might be acceptable to set this server for decision support queries then it might be acceptable to set this
to a value of many hours (in seconds). to a value of many hours (in seconds). It is also possible to set
<varname>max_standby_delay</> to -1 which means wait forever for queries
to complete, if there are conflicts; this will be useful when performing
an archive recovery from a backup.
</para> </para>
<para> <para>