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| author | Simon Riggs <simon@2ndQuadrant.com> | 2010-10-15 10:17:12 +0100 |
|---|---|---|
| committer | Simon Riggs <simon@2ndQuadrant.com> | 2010-10-15 10:17:12 +0100 |
| commit | 915116bc62db2aaec7001bde6610128f4cbd29f9 (patch) | |
| tree | 91caf8858492491b4eba0ea7f2d698e369ffef35 | |
| parent | 23177114c6f4f12d313d453e9153daf80c94c70b (diff) | |
| download | postgresql-915116bc62db2aaec7001bde6610128f4cbd29f9.tar.gz postgresql-915116bc62db2aaec7001bde6610128f4cbd29f9.zip | |
Correct WAL space calculation formula in docs.
Error pointed out by Fujii Masao, though not his patch.
| -rw-r--r-- | doc/src/sgml/wal.sgml | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/doc/src/sgml/wal.sgml b/doc/src/sgml/wal.sgml index 2726acb8a7e..5678d6ebdd8 100644 --- a/doc/src/sgml/wal.sgml +++ b/doc/src/sgml/wal.sgml @@ -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 |