<!--
-$PostgreSQL: pgsql/doc/src/sgml/runtime.sgml,v 1.336 2005/07/05 23:18:09 momjian Exp $
+$PostgreSQL: pgsql/doc/src/sgml/runtime.sgml,v 1.337 2005/07/06 14:45:12 momjian Exp $
-->
<chapter Id="runtime">
<para>
When this option is on, the <productname>PostgreSQL</> server
- writes full pages to WAL when they first modified after a checkpoint
- so full recovery is possible. Turning this option off might lead
- to a corrupt system after an operating system crash because
- uncorrected partial pages might contain inconsistent or corrupt
- data. The risks are less but similar to <varname>fsync</>.
+ writes full pages to WAL when they are first modified after a
+ checkpoint so full recovery is possible. Turning this option off
+ might lead to a corrupt system after an operating system crash
+ or power failure because uncorrected partial pages might contain
+ inconsistent or corrupt data. The risks are less but similar to
+ <varname>fsync</>.
</para>
<para>