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Add documentation mention that full page writes have to be enabled for 

full pages to be restored during recovery.

Per private report from Michael Renner
This commit is contained in:
Bruce Momjian 2009-01-15 00:34:25 +00:00
parent 6faf495b8a
commit 520c41b526
1 changed files with 3 additions and 2 deletions
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5
doc/src/sgml/wal.sgml
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@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/wal.sgml,v 1.57 2008/12/18 22:34:21 momjian Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/wal.sgml,v 1.58 2009/01/15 00:34:25 momjian Exp $ -->
<chapter id="wal">
<title>Reliability and the Write-Ahead Log</title>
@ -543,7 +543,8 @@
then the checkpoint record; then it performs the REDO operation by
scanning forward from the log position indicated in the checkpoint
record. Because the entire content of data pages is saved in the
log on the first page modification after a checkpoint, all pages
log on the first page modification after a checkpoint (assuming
<xref linkend="guc-full-page-writes"> is not disabled), all pages
changed since the checkpoint will be restored to a consistent
state.
</para>