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Turn PGBE_ACTIVITY_SIZE into a GUC variable, track_activity_query_size.

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As the buffer could now be a lot larger than before, and copying it could
thus be a lot more expensive than before, use strcpy instead of memcpy to
copy the query string, as was already suggested in comments. Also, only copy
the PgBackendStatus struct and string if the slot is in use.

Patch by Thomas Lee, with some changes by me.
This commit is contained in:
Heikki Linnakangas
2008-06-30 10:58:47 +00:00
parent 7ea9b997ef
commit 995fb74202
5 changed files with 77 additions and 18 deletions
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11
src/backend/utils/misc/guc.c
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@ -10,7 +10,7 @@
* Written by Peter Eisentraut <peter_e@gmx.net>.
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.456 2008/05/28 09:04:06 mha Exp $
* $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.457 2008/06/30 10:58:47 heikki Exp $
*
*--------------------------------------------------------------------
*/
@ -1848,6 +1848,15 @@ static struct config_int ConfigureNamesInt[] =
-1, -1, INT_MAX, NULL, NULL
},
{
{"track_activity_query_size", PGC_POSTMASTER, RESOURCES_MEM,
gettext_noop("Sets the size reserved for pg_stat_activity.current_query, in bytes."),
NULL,
},
&pgstat_track_activity_query_size,
1024, 100, 102400, NULL, NULL
},
/* End-of-list marker */
{
{NULL, 0, 0, NULL, NULL}, NULL, 0, 0, 0, NULL, NULL