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doc: list unlogged tables as a non-durable option

This commit is contained in:
Bruce Momjian 2014-03-24 22:04:44 -04:00
parent 5db55c6bbc
commit 6c5ced1526
1 changed files with 13 additions and 4 deletions
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17
doc/src/sgml/perform.sgml
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@ -1572,6 +1572,15 @@ SELECT * FROM x, y, a, b, c WHERE something AND somethingelse;
</para>
</listitem>
<listitem>
<para>
Turn off <xref linkend="guc-synchronous-commit">; there might be no
need to force <acronym>WAL</acronym> writes to disk on every
commit. This setting does risk transaction loss (though not data
corruption) in case of a crash of the <emphasis>database</>.
</para>
</listitem>
<listitem>
<para>
Turn off <xref linkend="guc-full-page-writes">; there is no need
@ -1590,12 +1599,12 @@ SELECT * FROM x, y, a, b, c WHERE something AND somethingelse;
<listitem>
<para>
Turn off <xref linkend="guc-synchronous-commit">; there might be no
need to write the <acronym>WAL</acronym> to disk on every
commit. This setting does risk transaction loss (though not data
corruption) in case of a crash of the <emphasis>database</> alone.
Create <link linkend="SQL-CREATETABLE-UNLOGGED">unlogged
tables</link> to avoid <acronym>WAL</acronym> writes, though it
makes the tables non-crash-safe.
</para>
</listitem>
</itemizedlist>
</para>
</sect1>