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Document that TCP keepalive settings read as 0 on Unix-socket connections.

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Per bug #7631 from Rob Johnson.  The code is operating as designed, but the
docs didn't explain it.
This commit is contained in:
Tom Lane 2012-10-31 14:26:20 -04:00
parent 9b8dd7e8aa
commit e774b7649c
1 changed files with 9 additions and 6 deletions
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15
doc/src/sgml/config.sgml
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@ -675,8 +675,9 @@ include 'filename'
an otherwise idle connection. A value of 0 uses the system default.
This parameter is supported only on systems that support the
<symbol>TCP_KEEPIDLE</> or <symbol>TCP_KEEPALIVE</> symbols, and on
Windows; on other systems, it must be zero. This parameter is ignored
for connections made via a Unix-domain socket.
Windows; on other systems, it must be zero.
In sessions connected via a Unix-domain socket, this parameter is
ignored and always reads as zero.
</para>
<note>
<para>
@ -698,8 +699,9 @@ include 'filename'
otherwise idle connection. A value of 0 uses the system default.
This parameter is supported only on systems that support the
<symbol>TCP_KEEPINTVL</> symbol, and on Windows; on other systems, it
must be zero. This parameter is ignored for connections made via a
Unix-domain socket.
must be zero.
In sessions connected via a Unix-domain socket, this parameter is
ignored and always reads as zero.
</para>
<note>
<para>
@ -720,8 +722,9 @@ include 'filename'
Specifies the number of keepalive packets to send on an otherwise idle
connection. A value of 0 uses the system default. This parameter is
supported only on systems that support the <symbol>TCP_KEEPCNT</>
symbol; on other systems, it must be zero. This parameter is ignored
for connections made via a Unix-domain socket.
symbol; on other systems, it must be zero.
In sessions connected via a Unix-domain socket, this parameter is
ignored and always reads as zero.
</para>
<note>
<para>