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| author | Simon Riggs <simon@2ndQuadrant.com> | 2010-01-29 18:39:05 +0000 |
|---|---|---|
| committer | Simon Riggs <simon@2ndQuadrant.com> | 2010-01-29 18:39:05 +0000 |
| commit | 6d2bc0a6cf5c8d9a3241a0d7afaf5ca8bf1f11ec (patch) | |
| tree | a99f7e3490d28b3546b909796ad76c8b6322cf72 /doc/src | |
| parent | d0cfc018233b4cdcab28d460ee0e14dbf87ac4ce (diff) | |
Augment WAL records for btree delete with GetOldestXmin() to reduce
false positives during Hot Standby conflict processing. Simple
patch to enhance conflict processing, following previous discussions.
Controlled by parameter minimize_standby_conflicts = on | off, with
default off allows measurement of performance impact to see whether
it should be set on all the time.
Diffstat (limited to 'doc/src')
| -rw-r--r-- | doc/src/sgml/config.sgml | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml index 71097ee21c8..c8c30c98415 100644 --- a/doc/src/sgml/config.sgml +++ b/doc/src/sgml/config.sgml @@ -1,4 +1,4 @@ -<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.246 2010/01/26 16:33:40 tgl Exp $ --> +<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.247 2010/01/29 18:39:05 sriggs Exp $ --> <chapter Id="runtime-config"> <title>Server Configuration</title> @@ -1840,6 +1840,22 @@ archive_command = 'copy "%p" "C:\\server\\archivedir\\%f"' # Windows </listitem> </varlistentry> + <varlistentry id="minimize-standby-conflicts" xreflabel="minimize_standby_conflicts"> + <term><varname>minimize_standby_conflicts</varname> (<type>boolean</type>)</term> + <indexterm> + <primary><varname>minimize_standby_conflicts</> configuration parameter</primary> + </indexterm> + <listitem> + <para> + Generates additional information to the transaction log (WAL) to minimize + the number of false positive cancelations caused by recovery conflicts on + a standby server that consumes WAL data from this server. + There is additional performance cost to enabling this parameter. + Parameter has no effect during recovery, only in normal running. + </para> + </listitem> + </varlistentry> + </variablelist> </sect2> </sect1> |