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Mark vacuum_defer_cleanup_age as PGC_POSTMASTER.

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Following bug analysis of #7819 by Tom Lane
This commit is contained in:
Simon Riggs 2013-02-02 18:50:42 +00:00
parent 231dbb3c9b
commit 9dd9993370
2 changed files with 7 additions and 3 deletions
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3
doc/src/sgml/config.sgml
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@ -2288,8 +2288,7 @@ SET ENABLE_SEQSCAN TO OFF;
is measured in terms of number of write transactions occurring on the is measured in terms of number of write transactions occurring on the
primary server, it is difficult to predict just how much additional primary server, it is difficult to predict just how much additional
grace time will be made available to standby queries. grace time will be made available to standby queries.
This parameter can only be set in the <filename>postgresql.conf</> This parameter can only be set at server start.
file or on the server command line.
</para> </para>
<para> <para>
You should also consider setting <varname>hot_standby_feedback</> You should also consider setting <varname>hot_standby_feedback</>

7
src/backend/utils/misc/guc.c
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@ -1880,7 +1880,12 @@ static struct config_int ConfigureNamesInt[] =
}, },
{ {
{"vacuum_defer_cleanup_age", PGC_SIGHUP, REPLICATION_MASTER, /*
* Setting this to a higher value without restarting postmaster
* can cause various bugs in TOAST object removal, CLUSTER and
* possibly other places, so this must be changed only on restart.
*/
{"vacuum_defer_cleanup_age", PGC_POSTMASTER, REPLICATION_MASTER,
gettext_noop("Number of transactions by which VACUUM and HOT cleanup should be deferred, if any."), gettext_noop("Number of transactions by which VACUUM and HOT cleanup should be deferred, if any."),
NULL NULL
}, },