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Update write-cache docs to mention windows behavior for various 

fsync_methods.

Magnus.
This commit is contained in:
Bruce Momjian 2007-12-16 14:03:32 +00:00
parent d6a18f459a
commit 900f84e275
1 changed files with 7 additions and 4 deletions
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11
doc/src/sgml/wal.sgml
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@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/wal.sgml,v 1.49 2007/12/10 22:08:36 momjian Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/wal.sgml,v 1.50 2007/12/16 14:03:32 momjian Exp $ -->
<chapter id="wal">
<title>Reliability and the Write-Ahead Log</title>
@ -65,10 +65,13 @@
write caching. On <productname>FreeBSD</> use
<application>atacontrol</>. (For SCSI disks use <ulink
url="http://sg.torque.net/sg/sdparm.html"><application>sdparm</></ulink>
to turn off <literal>WCE</>.) On <productname>Windows</> write caching is
disabled by unchecking <literal>My Computer\Open\{select disk
to turn off <literal>WCE</>.) On <productname>Windows</> if
<varname>wal_sync_method</> is <literal>open_datasync</> (the default),
write caching is disabled by unchecking <literal>My
Computer\Open\{select disk
drive}\Properties\Hardware\Properties\Policies\Enable write caching on
the disk</>.
the disk</>. Also on Windows, <literal>fsync</> and
<literal>fsync_writethrough</> never use write caching.
</para>
<para>