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Add functions to reset the statistics counter for a single table/index or
a single function.
1 parent 21d3ae0 commit 083e1b0

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6 files changed

+131
-7
lines changed

6 files changed

+131
-7
lines changed

‎doc/src/sgml/monitoring.sgml

Lines changed: 19 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1,4 +1,4 @@
1-
<!-- $PostgreSQL: pgsql/doc/src/sgml/monitoring.sgml,v 1.74 2010/01/19 14:11:30 mha Exp $ -->
1+
<!-- $PostgreSQL: pgsql/doc/src/sgml/monitoring.sgml,v 1.75 2010/01/28 14:25:41 mha Exp $ -->
22

33
<chapter id="monitoring">
44
<title>Monitoring Database Activity</title>
@@ -929,6 +929,24 @@ postgres: <replaceable>user</> <replaceable>database</> <replaceable>host</> <re
929929
<structname>pg_stat_bgwriter</>.
930930
</entry>
931931
</row>
932+
933+
<row>
934+
<entry><literal><function>pg_stat_reset_single_table_counters</function>(oid)</literal></entry>
935+
<entry><type>void</type></entry>
936+
<entry>
937+
Reset statistics for a single table or index in the current database to
938+
zero (requires superuser privileges)
939+
</entry>
940+
</row>
941+
942+
<row>
943+
<entry><literal><function>pg_stat_reset_single_function_counters</function>(oid)</literal></entry>
944+
<entry><type>void</type></entry>
945+
<entry>
946+
Reset statistics for a single function in the current database to
947+
zero (requires superuser privileges)
948+
</entry>
949+
</row>
932950
</tbody>
933951
</tgroup>
934952
</table>

‎src/backend/postmaster/pgstat.c

Lines changed: 58 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -13,7 +13,7 @@
1313
*
1414
* Copyright (c) 2001-2010, PostgreSQL Global Development Group
1515
*
16-
* $PostgreSQL: pgsql/src/backend/postmaster/pgstat.c,v 1.198 2010/01/19 14:11:30 mha Exp $
16+
* $PostgreSQL: pgsql/src/backend/postmaster/pgstat.c,v 1.199 2010/01/28 14:25:41 mha Exp $
1717
* ----------
1818
*/
1919
#include "postgres.h"
@@ -271,6 +271,7 @@ static void pgstat_recv_tabpurge(PgStat_MsgTabpurge *msg, int len);
271271
static void pgstat_recv_dropdb(PgStat_MsgDropdb *msg, int len);
272272
static void pgstat_recv_resetcounter(PgStat_MsgResetcounter *msg, int len);
273273
static void pgstat_recv_resetsharedcounter(PgStat_MsgResetsharedcounter *msg, int len);
274+
static void pgstat_recv_resetsinglecounter(PgStat_MsgResetsinglecounter *msg, int len);
274275
static void pgstat_recv_autovac(PgStat_MsgAutovacStart *msg, int len);
275276
static void pgstat_recv_vacuum(PgStat_MsgVacuum *msg, int len);
276277
static void pgstat_recv_analyze(PgStat_MsgAnalyze *msg, int len);
@@ -1187,6 +1188,32 @@ pgstat_reset_shared_counters(const char *target)
11871188
pgstat_send(&msg, sizeof(msg));
11881189
}
11891190

1191+
/* ----------
1192+
* pgstat_reset_single_counter() -
1193+
*
1194+
* Tell the statistics collector to reset a single counter.
1195+
* ----------
1196+
*/
1197+
void pgstat_reset_single_counter(Oid objoid, PgStat_Single_Reset_Type type)
1198+
{
1199+
PgStat_MsgResetsinglecounter msg;
1200+
1201+
if (pgStatSock < 0)
1202+
return;
1203+
1204+
if (!superuser())
1205+
ereport(ERROR,
1206+
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
1207+
errmsg("must be superuser to reset statistics counters")));
1208+
1209+
pgstat_setheader(&msg.m_hdr, PGSTAT_MTYPE_RESETSINGLECOUNTER);
1210+
msg.m_databaseid = MyDatabaseId;
1211+
msg.m_resettype = type;
1212+
msg.m_objectid = objoid;
1213+
1214+
pgstat_send(&msg, sizeof(msg));
1215+
}
1216+
11901217
/* ----------
11911218
* pgstat_report_autovac() -
11921219
*
@@ -2954,6 +2981,12 @@ PgstatCollectorMain(int argc, char *argv[])
29542981
len);
29552982
break;
29562983

2984+
case PGSTAT_MTYPE_RESETSINGLECOUNTER:
2985+
pgstat_recv_resetsinglecounter(
2986+
(PgStat_MsgResetsinglecounter *) &msg,
2987+
len);
2988+
break;
2989+
29572990
case PGSTAT_MTYPE_AUTOVAC_START:
29582991
pgstat_recv_autovac((PgStat_MsgAutovacStart *) &msg, len);
29592992
break;
@@ -3928,6 +3961,30 @@ pgstat_recv_resetsharedcounter(PgStat_MsgResetsharedcounter *msg, int len)
39283961
*/
39293962
}
39303963

3964+
/* ----------
3965+
* pgstat_recv_resetsinglecounter() -
3966+
*
3967+
* Reset a statistics for a single object
3968+
* ----------
3969+
*/
3970+
static void
3971+
pgstat_recv_resetsinglecounter(PgStat_MsgResetsinglecounter *msg, int len)
3972+
{
3973+
PgStat_StatDBEntry *dbentry;
3974+
3975+
dbentry = pgstat_get_db_entry(msg->m_databaseid, false);
3976+
3977+
if (!dbentry)
3978+
return;
3979+
3980+
3981+
/* Remove object if it exists, ignore it if not */
3982+
if (msg->m_resettype == RESET_TABLE)
3983+
(void) hash_search(dbentry->tables, (void *) &(msg->m_objectid), HASH_REMOVE, NULL);
3984+
else if (msg->m_resettype == RESET_FUNCTION)
3985+
(void) hash_search(dbentry->functions, (void *)&(msg->m_objectid), HASH_REMOVE, NULL);
3986+
}
3987+
39313988
/* ----------
39323989
* pgstat_recv_autovac() -
39333990
*

‎src/backend/utils/adt/pgstatfuncs.c

Lines changed: 24 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -8,7 +8,7 @@
88
*
99
*
1010
* IDENTIFICATION
11-
* $PostgreSQL: pgsql/src/backend/utils/adt/pgstatfuncs.c,v 1.58 2010/01/19 14:11:31 mha Exp $
11+
* $PostgreSQL: pgsql/src/backend/utils/adt/pgstatfuncs.c,v 1.59 2010/01/28 14:25:41 mha Exp $
1212
*
1313
*-------------------------------------------------------------------------
1414
*/
@@ -79,6 +79,8 @@ extern Datum pg_stat_get_buf_alloc(PG_FUNCTION_ARGS);
7979
extern Datum pg_stat_clear_snapshot(PG_FUNCTION_ARGS);
8080
extern Datum pg_stat_reset(PG_FUNCTION_ARGS);
8181
extern Datum pg_stat_reset_shared(PG_FUNCTION_ARGS);
82+
extern Datum pg_stat_reset_single_table_counters(PG_FUNCTION_ARGS);
83+
extern Datum pg_stat_reset_single_function_counters(PG_FUNCTION_ARGS);
8284

8385
/* Global bgwriter statistics, from bgwriter.c */
8486
extern PgStat_MsgBgWriter bgwriterStats;
@@ -1120,3 +1122,24 @@ pg_stat_reset_shared(PG_FUNCTION_ARGS)
11201122

11211123
PG_RETURN_VOID();
11221124
}
1125+
1126+
/* Reset a a single counter in the current database */
1127+
Datum
1128+
pg_stat_reset_single_table_counters(PG_FUNCTION_ARGS)
1129+
{
1130+
Oid taboid = PG_GETARG_OID(0);
1131+
1132+
pgstat_reset_single_counter(taboid, RESET_TABLE);
1133+
1134+
PG_RETURN_VOID();
1135+
}
1136+
1137+
Datum
1138+
pg_stat_reset_single_function_counters(PG_FUNCTION_ARGS)
1139+
{
1140+
Oid funcoid = PG_GETARG_OID(0);
1141+
1142+
pgstat_reset_single_counter(funcoid, RESET_FUNCTION);
1143+
1144+
PG_RETURN_VOID();
1145+
}

‎src/include/catalog/catversion.h

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -37,7 +37,7 @@
3737
* Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
3838
* Portions Copyright (c) 1994, Regents of the University of California
3939
*
40-
* $PostgreSQL: pgsql/src/include/catalog/catversion.h,v 1.579 2010/01/25 20:55:32 tgl Exp $
40+
* $PostgreSQL: pgsql/src/include/catalog/catversion.h,v 1.580 2010/01/28 14:25:41 mha Exp $
4141
*
4242
*-------------------------------------------------------------------------
4343
*/
@@ -53,6 +53,6 @@
5353
*/
5454

5555
/* yyyymmddN */
56-
#define CATALOG_VERSION_NO 201001251
56+
#define CATALOG_VERSION_NO 201001281
5757

5858
#endif

‎src/include/catalog/pg_proc.h

Lines changed: 5 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -7,7 +7,7 @@
77
* Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
88
* Portions Copyright (c) 1994, Regents of the University of California
99
*
10-
* $PostgreSQL: pgsql/src/include/catalog/pg_proc.h,v 1.565 2010/01/25 20:55:32 tgl Exp $
10+
* $PostgreSQL: pgsql/src/include/catalog/pg_proc.h,v 1.566 2010/01/28 14:25:41 mha Exp $
1111
*
1212
* NOTES
1313
* The script catalog/genbki.pl reads this file and generates .bki
@@ -3087,6 +3087,10 @@ DATA(insert OID = 2274 ( pg_stat_reset PGNSP PGUID 12 1 0 0 f f f f f v 0 0
30873087
DESCR("statistics: reset collected statistics for current database");
30883088
DATA(insert OID = 3775 ( pg_stat_reset_shared PGNSP PGUID 12 1 0 0 f f f f f v 1 0 2278 "25" _null_ _null_ _null_ _null_ pg_stat_reset_shared _null_ _null_ _null_ ));
30893089
DESCR("statistics: reset collected statistics shared across the cluster");
3090+
DATA(insert OID = 3776 ( pg_stat_reset_single_table_counters PGNSP PGUID 12 1 0 0 f f f f f v 1 0 2278 "26" _null_ _null_ _null_ _null_ pg_stat_reset_single_table_counters _null_ _null_ _null_ ));
3091+
DESCR("statistics: reset collected statistics for a single table or index in the current database");
3092+
DATA(insert OID = 3777 ( pg_stat_reset_single_function_counters PGNSP PGUID 12 1 0 0 f f f f f v 1 0 2278 "26" _null_ _null_ _null_ _null_ pg_stat_reset_single_function_counters _null_ _null_ _null_ ));
3093+
DESCR("statistics: reset collected statistics for a single function in the current database");
30903094

30913095
DATA(insert OID = 1946 ( encode PGNSP PGUID 12 1 0 0 f f f t f i 2 0 25 "17 25" _null_ _null_ _null_ _null_ binary_encode _null_ _null_ _null_ ));
30923096
DESCR("convert bytea value into some ascii-only text string");

‎src/include/pgstat.h

Lines changed: 23 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -5,7 +5,7 @@
55
*
66
* Copyright (c) 2001-2010, PostgreSQL Global Development Group
77
*
8-
* $PostgreSQL: pgsql/src/include/pgstat.h,v 1.87 2010/01/19 14:11:31 mha Exp $
8+
* $PostgreSQL: pgsql/src/include/pgstat.h,v 1.88 2010/01/28 14:25:41 mha Exp $
99
* ----------
1010
*/
1111
#ifndef PGSTAT_H
@@ -39,6 +39,7 @@ typedef enum StatMsgType
3939
PGSTAT_MTYPE_DROPDB,
4040
PGSTAT_MTYPE_RESETCOUNTER,
4141
PGSTAT_MTYPE_RESETSHAREDCOUNTER,
42+
PGSTAT_MTYPE_RESETSINGLECOUNTER,
4243
PGSTAT_MTYPE_AUTOVAC_START,
4344
PGSTAT_MTYPE_VACUUM,
4445
PGSTAT_MTYPE_ANALYZE,
@@ -100,6 +101,12 @@ typedef enum PgStat_Shared_Reset_Target
100101
RESET_BGWRITER
101102
} PgStat_Shared_Reset_Target;
102103

104+
/* Possible object types for resetting single counters */
105+
typedef enum PgStat_Single_Reset_Type
106+
{
107+
RESET_TABLE,
108+
RESET_FUNCTION
109+
} PgStat_Single_Reset_Type;
103110

104111
/* ------------------------------------------------------------
105112
* Structures kept in backend local memory while accumulating counts
@@ -278,6 +285,19 @@ typedef struct PgStat_MsgResetsharedcounter
278285
PgStat_Shared_Reset_Target m_resettarget;
279286
} PgStat_MsgResetsharedcounter;
280287

288+
/* ----------
289+
* PgStat_MsgResetsinglecounter Sent by the backend to tell the collector
290+
* to reset a single counter
291+
* ----------
292+
*/
293+
typedef struct PgStat_MsgResetsinglecounter
294+
{
295+
PgStat_MsgHdr m_hdr;
296+
Oid m_databaseid;
297+
PgStat_Single_Reset_Type m_resettype;
298+
Oid m_objectid;
299+
} PgStat_MsgResetsinglecounter;
300+
281301
/* ----------
282302
* PgStat_MsgAutovacStart Sent by the autovacuum daemon to signal
283303
* that a database is going to be processed
@@ -432,6 +452,7 @@ typedef union PgStat_Msg
432452
PgStat_MsgDropdb msg_dropdb;
433453
PgStat_MsgResetcounter msg_resetcounter;
434454
PgStat_MsgResetsharedcounter msg_resetsharedcounter;
455+
PgStat_MsgResetsinglecounter msg_resetsinglecounter;
435456
PgStat_MsgAutovacStart msg_autovacuum;
436457
PgStat_MsgVacuum msg_vacuum;
437458
PgStat_MsgAnalyze msg_analyze;
@@ -654,6 +675,7 @@ extern void pgstat_drop_database(Oid databaseid);
654675
extern void pgstat_clear_snapshot(void);
655676
extern void pgstat_reset_counters(void);
656677
extern void pgstat_reset_shared_counters(const char *);
678+
extern void pgstat_reset_single_counter(Oid objectid, PgStat_Single_Reset_Type type);
657679

658680
extern void pgstat_report_autovac(Oid dboid);
659681
extern void pgstat_report_vacuum(Oid tableoid, bool shared, bool adopt_counts,

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