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Remove secondary checkpoint

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Previously server reserved WAL for last two checkpoints,
which used too much disk space for small servers.

Bumps PG_CONTROL_VERSION

Author: Simon Riggs <simon@2ndQuadrant.com>
Reviewed-by: Michael Paquier <michael.paquier@gmail.com>
This commit is contained in:
Simon Riggs
2017-11-07 12:56:30 -05:00
parent 98267ee83e
commit 4b0d28de06
8 changed files with 61 additions and 125 deletions
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2
doc/src/sgml/backup.sgml
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@ -568,7 +568,7 @@ tar -cf backup.tar /usr/local/pgsql/data
normally creates just a few segment files and then
<quote>recycles</quote> them by renaming no-longer-needed segment files
to higher segment numbers. It's assumed that segment files whose
contents precede the checkpoint-before-last are no longer of
contents precede the last checkpoint are no longer of
interest and can be recycled.
</para>

5
doc/src/sgml/func.sgml
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@ -17948,11 +17948,6 @@ SELECT collation for ('foo' COLLATE "de_DE");
<entry><type>pg_lsn</type></entry>
</row>
<row>
<entry><literal>prior_lsn</literal></entry>
<entry><type>pg_lsn</type></entry>
</row>
<row>
<entry><literal>redo_lsn</literal></entry>
<entry><type>pg_lsn</type></entry>