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Augment WAL records for btree delete with GetOldestXmin() to reduce

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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.
This commit is contained in:
Simon Riggs
2010-01-29 18:39:05 +00:00
parent d0cfc01823
commit 6d2bc0a6cf
6 changed files with 48 additions and 12 deletions
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3
src/backend/access/transam/xlog.c
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@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/backend/access/transam/xlog.c,v 1.364 2010/01/28 19:17:22 heikki Exp $
* $PostgreSQL: pgsql/src/backend/access/transam/xlog.c,v 1.365 2010/01/29 18:39:05 sriggs Exp $
*
*-------------------------------------------------------------------------
*/
@ -71,6 +71,7 @@ bool XLogArchiveMode = false;
char *XLogArchiveCommand = NULL;
bool XLogRequestRecoveryConnections = true;
int MaxStandbyDelay = 30;
bool MinimizeStandbyConflicts = false;
bool fullPageWrites = true;
bool log_checkpoints = false;
int sync_method = DEFAULT_SYNC_METHOD;