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Add a note to the documentation to clarify that even when

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"autovacuum = off", the system may still periodically start autovacuum
processes to prevent XID wraparound. Patch from David Fetter, with
editorializing.
This commit is contained in:
Neil Conway 2007-05-15 15:35:46 +00:00
parent 3288d5a989
commit 513836c7aa
1 changed files with 7 additions and 1 deletions
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8
doc/src/sgml/config.sgml
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@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.122 2007/04/20 02:37:37 tgl Exp $ --> <!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.123 2007/05/15 15:35:46 neilc Exp $ -->
<chapter Id="runtime-config"> <chapter Id="runtime-config">
<title>Server Configuration</title> <title>Server Configuration</title>
@ -3172,6 +3172,12 @@ SELECT * FROM parent WHERE key = 2400;
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>
<para>
Note that even when this parameter is disabled, the system
will periodically launch autovacuum processes in order to
prevent transaction ID wraparound. See <xref
linkend="vacuum-for-wraparound"> for more information.
</para>
</listitem> </listitem>
</varlistentry> </varlistentry>