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Correct WAL space calculation formula in docs.

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Error pointed out by Fujii Masao, though not his patch.
This commit is contained in:
Simon Riggs 2010-10-15 10:17:12 +01:00
parent 23177114c6
commit 915116bc62
1 changed files with 3 additions and 3 deletions
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6
doc/src/sgml/wal.sgml
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@ -450,9 +450,9 @@
<para>
There will always be at least one WAL segment file, and will normally
not be more than (2 + <varname>checkpoint_completion_target</varname>) * <varname>checkpoint_segments</varname> + 1
or <varname>checkpoint_segments</> + <xref linkend="guc-wal-keep-segments"> + 1
files. Each segment file is normally 16 MB (though this size can be
not be more files than the higher of <xref linkend="guc-wal-keep-segments"> or
(2 + <varname>checkpoint_completion_target</varname>) * <varname>checkpoint_segments</varname> + 1.
Each segment file is normally 16 MB (though this size can be
altered when building the server). You can use this to estimate space
requirements for <acronym>WAL</acronym>.
Ordinarily, when old log segment files are no longer needed, they