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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 /src/backend/utils/misc/guc.c | |
| parent | d0cfc018233b4cdcab28d460ee0e14dbf87ac4ce (diff) | |
| download | postgresql-6d2bc0a6cf5c8d9a3241a0d7afaf5ca8bf1f11ec.tar.gz postgresql-6d2bc0a6cf5c8d9a3241a0d7afaf5ca8bf1f11ec.zip | |
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 'src/backend/utils/misc/guc.c')
| -rw-r--r-- | src/backend/utils/misc/guc.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/src/backend/utils/misc/guc.c b/src/backend/utils/misc/guc.c index 00ea55d5979..adf9f72b359 100644 --- a/src/backend/utils/misc/guc.c +++ b/src/backend/utils/misc/guc.c @@ -10,7 +10,7 @@ * Written by Peter Eisentraut <peter_e@gmx.net>. * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.536 2010/01/26 16:33:40 tgl Exp $ + * $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.537 2010/01/29 18:39:05 sriggs Exp $ * *-------------------------------------------------------------------- */ @@ -1223,6 +1223,17 @@ static struct config_bool ConfigureNamesBool[] = }, { + {"minimize_standby_conflicts", PGC_POSTMASTER, WAL_SETTINGS, + gettext_noop("Additional information is added to WAL records to" + " minimize the number of false positive cancelations" + " caused by recovery conflicts on WAL standby nodes."), + NULL + }, + &MinimizeStandbyConflicts, + false, NULL, NULL + }, + + { {"allow_system_table_mods", PGC_POSTMASTER, DEVELOPER_OPTIONS, gettext_noop("Allows modifications of the structure of system tables."), NULL, |