log_autovacuum = on produces a single line of output from autovacuum,
with additional useful stats. Patch is proving useful in performance
testing. Not sure what is intended on logging for 8.3....
LOG: autovac "public.w" scans:1 pages:197(-0) tuples:2338(-7199) CPU
0.00s/0.00u sec elapsed 0.39 sec
LOG: autovac "public.s" scans:1 pages:1926746(-0)
tuples:37000611(-3461867) CPU 99.74s/53.37u sec elapsed 7977.20 sec
No docs yet, but will do this if accepted.
scans: N number of times indexes have been scanned
pages: remaining(-removed)
tuples: remaining(-removed)
CPU
elapsed
--
Simon Riggs
EnterpriseDB http://www.enterprisedb.com
Index: src/backend/commands/vacuumlazy.c
===================================================================
RCS file: /projects/cvsroot/pgsql/src/backend/commands/vacuumlazy.c,v
retrieving revision 1.85
diff -c -r1.85 vacuumlazy.c
*** src/backend/commands/vacuumlazy.c 21 Feb 2007 22:47:45 -0000 1.85
--- src/backend/commands/vacuumlazy.c 8 Mar 2007 15:51:06 -0000
***************
*** 49,54 ****
--- 49,55 ----
#include "access/transam.h"
#include "commands/vacuum.h"
#include "miscadmin.h"
+ #include "postmaster/autovacuum.h"
#include "pgstat.h"
#include "storage/freespace.h"
#include "utils/lsyscache.h"
***************
*** 90,95 ****
--- 91,97 ----
int max_free_pages; /* # slots allocated in array */
PageFreeSpaceInfo *free_pages; /* array or heap of blkno/avail */
BlockNumber tot_free_pages; /* total pages with >= threshold space */
+ int num_index_scans; /* number of scans of index */
} LVRelStats;
***************
*** 141,146 ****
--- 143,151 ----
Relation *Irel;
int nindexes;
BlockNumber possibly_freeable;
+ PGRUsage ru0;
+
+ pg_rusage_init(&ru0);
if (vacstmt->verbose)
elevel = INFO;
***************
*** 156,161 ****
--- 161,168 ----
/* XXX should we scale it up or down? Adjust vacuum.c too, if so */
vacrelstats->threshold = GetAvgFSMRequestSize(&onerel->rd_node);
+ vacrelstats->num_index_scans = 0;
+
/* Open all indexes of the relation */
vac_open_indexes(onerel, RowExclusiveLock, &nindexes, &Irel);
vacrelstats->hasindex = (nindexes > 0);
***************
*** 200,205 ****
--- 207,220 ----
/* report results to the stats collector, too */
pgstat_report_vacuum(RelationGetRelid(onerel), onerel->rd_rel->relisshared,
vacstmt->analyze, vacrelstats->rel_tuples);
+ if (Log_autovacuum && IsAutoVacuumProcess())
+ ereport(LOG,
+ (errmsg("autovac \"%s.%s\" scans:%d pages:%d(-%d) tuples:%.0f(-%.0f) %s",
+ get_namespace_name(RelationGetNamespace(onerel)),
+ RelationGetRelationName(onerel), vacrelstats->num_index_scans,
+ vacrelstats->rel_pages, vacrelstats->pages_removed,
+ vacrelstats->rel_tuples, vacrelstats->tuples_deleted,
+ pg_rusage_show(&ru0))));
}
***************
*** 282,287 ****
--- 297,303 ----
lazy_vacuum_heap(onerel, vacrelstats);
/* Forget the now-vacuumed tuples, and press on */
vacrelstats->num_dead_tuples = 0;
+ vacrelstats->num_index_scans++;
}
buf = ReadBuffer(onerel, blkno);
***************
*** 490,495 ****
--- 506,512 ----
vacrelstats);
/* Remove tuples from heap */
lazy_vacuum_heap(onerel, vacrelstats);
+ vacrelstats->num_index_scans++;
}
/* Do post-vacuum cleanup and statistics update for each index */
Index: src/backend/postmaster/autovacuum.c
===================================================================
RCS file: /projects/cvsroot/pgsql/src/backend/postmaster/autovacuum.c,v
retrieving revision 1.33
diff -c -r1.33 autovacuum.c
*** src/backend/postmaster/autovacuum.c 7 Mar 2007 13:35:02 -0000 1.33
--- src/backend/postmaster/autovacuum.c 8 Mar 2007 15:51:07 -0000
***************
*** 69,74 ****
--- 69,76 ----
int autovacuum_vac_cost_delay;
int autovacuum_vac_cost_limit;
+ bool Log_autovacuum = false;
+
/* Flag to tell if we are in the autovacuum daemon process */
static bool am_autovacuum_launcher = false;
static bool am_autovacuum_worker = false;
Index: src/backend/utils/misc/guc.c
===================================================================
RCS file: /projects/cvsroot/pgsql/src/backend/utils/misc/guc.c,v
retrieving revision 1.379
diff -c -r1.379 guc.c
*** src/backend/utils/misc/guc.c 6 Mar 2007 02:06:14 -0000 1.379
--- src/backend/utils/misc/guc.c 8 Mar 2007 15:51:11 -0000
***************
*** 584,589 ****
--- 584,597 ----
false, NULL, NULL
},
{
+ {"log_autovacuum", PGC_BACKEND, LOGGING_WHAT,
+ gettext_noop("Logs end of a session, including duration."),
+ NULL
+ },
+ &Log_autovacuum,
+ false, NULL, NULL
+ },
+ {
{"debug_assertions", PGC_USERSET, DEVELOPER_OPTIONS,
gettext_noop("Turns on various assertion checks."),
gettext_noop("This is a debugging aid."),
Index: src/include/postmaster/autovacuum.h
===================================================================
RCS file: /projects/cvsroot/pgsql/src/include/postmaster/autovacuum.h,v
retrieving revision 1.8
diff -c -r1.8 autovacuum.h
*** src/include/postmaster/autovacuum.h 15 Feb 2007 23:23:23 -0000 1.8
--- src/include/postmaster/autovacuum.h 8 Mar 2007 15:51:18 -0000
***************
*** 25,30 ****
--- 25,32 ----
extern int autovacuum_vac_cost_delay;
extern int autovacuum_vac_cost_limit;
+ extern bool Log_autovacuum;
+
/* Status inquiry functions */
extern bool AutoVacuumingActive(void);
extern bool IsAutoVacuumLauncherProcess(void);
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