Add functions to reset the statistics counter for a single table/index or
a single function.
This commit is contained in:
Magnus Hagander
parent
21d3ae09da
commit
083e1b0f27
@ -1,4 +1,4 @@
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<!-- $PostgreSQL: pgsql/doc/src/sgml/monitoring.sgml,v 1.74 2010/01/19 14:11:30 mha Exp $ -->
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<!-- $PostgreSQL: pgsql/doc/src/sgml/monitoring.sgml,v 1.75 2010/01/28 14:25:41 mha Exp $ -->
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<chapter id="monitoring">
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<title>Monitoring Database Activity</title>
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@ -929,6 +929,24 @@ postgres: <replaceable>user</> <replaceable>database</> <replaceable>host</> <re
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<structname>pg_stat_bgwriter</>.
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</entry>
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</row>
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<row>
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<entry><literal><function>pg_stat_reset_single_table_counters</function>(oid)</literal></entry>
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<entry><type>void</type></entry>
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<entry>
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Reset statistics for a single table or index in the current database to
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zero (requires superuser privileges)
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</entry>
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</row>
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<row>
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<entry><literal><function>pg_stat_reset_single_function_counters</function>(oid)</literal></entry>
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<entry><type>void</type></entry>
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<entry>
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Reset statistics for a single function in the current database to
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zero (requires superuser privileges)
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</entry>
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</row>
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</tbody>
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</tgroup>
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</table>
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@ -13,7 +13,7 @@
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*
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* Copyright (c) 2001-2010, PostgreSQL Global Development Group
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*
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* $PostgreSQL: pgsql/src/backend/postmaster/pgstat.c,v 1.198 2010/01/19 14:11:30 mha Exp $
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* $PostgreSQL: pgsql/src/backend/postmaster/pgstat.c,v 1.199 2010/01/28 14:25:41 mha Exp $
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* ----------
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*/
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#include "postgres.h"
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@ -271,6 +271,7 @@ static void pgstat_recv_tabpurge(PgStat_MsgTabpurge *msg, int len);
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static void pgstat_recv_dropdb(PgStat_MsgDropdb *msg, int len);
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static void pgstat_recv_resetcounter(PgStat_MsgResetcounter *msg, int len);
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static void pgstat_recv_resetsharedcounter(PgStat_MsgResetsharedcounter *msg, int len);
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static void pgstat_recv_resetsinglecounter(PgStat_MsgResetsinglecounter *msg, int len);
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static void pgstat_recv_autovac(PgStat_MsgAutovacStart *msg, int len);
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static void pgstat_recv_vacuum(PgStat_MsgVacuum *msg, int len);
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static void pgstat_recv_analyze(PgStat_MsgAnalyze *msg, int len);
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@ -1187,6 +1188,32 @@ pgstat_reset_shared_counters(const char *target)
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pgstat_send(&msg, sizeof(msg));
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}
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/* ----------
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* pgstat_reset_single_counter() -
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*
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* Tell the statistics collector to reset a single counter.
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* ----------
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*/
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void pgstat_reset_single_counter(Oid objoid, PgStat_Single_Reset_Type type)
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{
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PgStat_MsgResetsinglecounter msg;
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if (pgStatSock < 0)
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return;
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if (!superuser())
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ereport(ERROR,
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(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
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errmsg("must be superuser to reset statistics counters")));
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pgstat_setheader(&msg.m_hdr, PGSTAT_MTYPE_RESETSINGLECOUNTER);
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msg.m_databaseid = MyDatabaseId;
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msg.m_resettype = type;
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msg.m_objectid = objoid;
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pgstat_send(&msg, sizeof(msg));
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}
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/* ----------
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* pgstat_report_autovac() -
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*
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@ -2954,6 +2981,12 @@ PgstatCollectorMain(int argc, char *argv[])
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len);
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break;
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case PGSTAT_MTYPE_RESETSINGLECOUNTER:
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pgstat_recv_resetsinglecounter(
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(PgStat_MsgResetsinglecounter *) &msg,
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len);
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break;
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case PGSTAT_MTYPE_AUTOVAC_START:
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pgstat_recv_autovac((PgStat_MsgAutovacStart *) &msg, len);
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break;
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@ -3928,6 +3961,30 @@ pgstat_recv_resetsharedcounter(PgStat_MsgResetsharedcounter *msg, int len)
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*/
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}
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/* ----------
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* pgstat_recv_resetsinglecounter() -
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*
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* Reset a statistics for a single object
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* ----------
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*/
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static void
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pgstat_recv_resetsinglecounter(PgStat_MsgResetsinglecounter *msg, int len)
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{
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PgStat_StatDBEntry *dbentry;
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dbentry = pgstat_get_db_entry(msg->m_databaseid, false);
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if (!dbentry)
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return;
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/* Remove object if it exists, ignore it if not */
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if (msg->m_resettype == RESET_TABLE)
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(void) hash_search(dbentry->tables, (void *) &(msg->m_objectid), HASH_REMOVE, NULL);
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else if (msg->m_resettype == RESET_FUNCTION)
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(void) hash_search(dbentry->functions, (void *)&(msg->m_objectid), HASH_REMOVE, NULL);
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}
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/* ----------
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* pgstat_recv_autovac() -
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*
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@ -8,7 +8,7 @@
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*
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/utils/adt/pgstatfuncs.c,v 1.58 2010/01/19 14:11:31 mha Exp $
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* $PostgreSQL: pgsql/src/backend/utils/adt/pgstatfuncs.c,v 1.59 2010/01/28 14:25:41 mha Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -79,6 +79,8 @@ extern Datum pg_stat_get_buf_alloc(PG_FUNCTION_ARGS);
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extern Datum pg_stat_clear_snapshot(PG_FUNCTION_ARGS);
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extern Datum pg_stat_reset(PG_FUNCTION_ARGS);
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extern Datum pg_stat_reset_shared(PG_FUNCTION_ARGS);
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extern Datum pg_stat_reset_single_table_counters(PG_FUNCTION_ARGS);
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extern Datum pg_stat_reset_single_function_counters(PG_FUNCTION_ARGS);
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/* Global bgwriter statistics, from bgwriter.c */
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extern PgStat_MsgBgWriter bgwriterStats;
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@ -1120,3 +1122,24 @@ pg_stat_reset_shared(PG_FUNCTION_ARGS)
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PG_RETURN_VOID();
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}
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/* Reset a a single counter in the current database */
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Datum
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pg_stat_reset_single_table_counters(PG_FUNCTION_ARGS)
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{
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Oid taboid = PG_GETARG_OID(0);
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pgstat_reset_single_counter(taboid, RESET_TABLE);
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PG_RETURN_VOID();
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}
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Datum
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pg_stat_reset_single_function_counters(PG_FUNCTION_ARGS)
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{
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Oid funcoid = PG_GETARG_OID(0);
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pgstat_reset_single_counter(funcoid, RESET_FUNCTION);
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PG_RETURN_VOID();
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}
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@ -37,7 +37,7 @@
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* Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $PostgreSQL: pgsql/src/include/catalog/catversion.h,v 1.579 2010/01/25 20:55:32 tgl Exp $
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* $PostgreSQL: pgsql/src/include/catalog/catversion.h,v 1.580 2010/01/28 14:25:41 mha Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -53,6 +53,6 @@
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*/
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/* yyyymmddN */
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#define CATALOG_VERSION_NO 201001251
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#define CATALOG_VERSION_NO 201001281
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#endif
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@ -7,7 +7,7 @@
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* Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $PostgreSQL: pgsql/src/include/catalog/pg_proc.h,v 1.565 2010/01/25 20:55:32 tgl Exp $
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* $PostgreSQL: pgsql/src/include/catalog/pg_proc.h,v 1.566 2010/01/28 14:25:41 mha Exp $
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*
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* NOTES
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* The script catalog/genbki.pl reads this file and generates .bki
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@ -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
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DESCR("statistics: reset collected statistics for current database");
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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_ ));
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DESCR("statistics: reset collected statistics shared across the cluster");
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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_ ));
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DESCR("statistics: reset collected statistics for a single table or index in the current database");
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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_ ));
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DESCR("statistics: reset collected statistics for a single function in the current database");
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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_ ));
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DESCR("convert bytea value into some ascii-only text string");
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@ -5,7 +5,7 @@
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*
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* Copyright (c) 2001-2010, PostgreSQL Global Development Group
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*
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* $PostgreSQL: pgsql/src/include/pgstat.h,v 1.87 2010/01/19 14:11:31 mha Exp $
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* $PostgreSQL: pgsql/src/include/pgstat.h,v 1.88 2010/01/28 14:25:41 mha Exp $
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* ----------
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*/
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#ifndef PGSTAT_H
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@ -39,6 +39,7 @@ typedef enum StatMsgType
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PGSTAT_MTYPE_DROPDB,
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PGSTAT_MTYPE_RESETCOUNTER,
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PGSTAT_MTYPE_RESETSHAREDCOUNTER,
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PGSTAT_MTYPE_RESETSINGLECOUNTER,
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PGSTAT_MTYPE_AUTOVAC_START,
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PGSTAT_MTYPE_VACUUM,
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PGSTAT_MTYPE_ANALYZE,
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@ -100,6 +101,12 @@ typedef enum PgStat_Shared_Reset_Target
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RESET_BGWRITER
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} PgStat_Shared_Reset_Target;
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/* Possible object types for resetting single counters */
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typedef enum PgStat_Single_Reset_Type
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{
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RESET_TABLE,
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RESET_FUNCTION
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} PgStat_Single_Reset_Type;
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/* ------------------------------------------------------------
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* Structures kept in backend local memory while accumulating counts
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@ -278,6 +285,19 @@ typedef struct PgStat_MsgResetsharedcounter
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PgStat_Shared_Reset_Target m_resettarget;
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} PgStat_MsgResetsharedcounter;
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/* ----------
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* PgStat_MsgResetsinglecounter Sent by the backend to tell the collector
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* to reset a single counter
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* ----------
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*/
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typedef struct PgStat_MsgResetsinglecounter
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{
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PgStat_MsgHdr m_hdr;
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Oid m_databaseid;
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PgStat_Single_Reset_Type m_resettype;
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Oid m_objectid;
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} PgStat_MsgResetsinglecounter;
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/* ----------
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* PgStat_MsgAutovacStart Sent by the autovacuum daemon to signal
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* that a database is going to be processed
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@ -432,6 +452,7 @@ typedef union PgStat_Msg
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PgStat_MsgDropdb msg_dropdb;
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PgStat_MsgResetcounter msg_resetcounter;
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PgStat_MsgResetsharedcounter msg_resetsharedcounter;
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PgStat_MsgResetsinglecounter msg_resetsinglecounter;
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PgStat_MsgAutovacStart msg_autovacuum;
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PgStat_MsgVacuum msg_vacuum;
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PgStat_MsgAnalyze msg_analyze;
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@ -654,6 +675,7 @@ extern void pgstat_drop_database(Oid databaseid);
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extern void pgstat_clear_snapshot(void);
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extern void pgstat_reset_counters(void);
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extern void pgstat_reset_shared_counters(const char *);
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extern void pgstat_reset_single_counter(Oid objectid, PgStat_Single_Reset_Type type);
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extern void pgstat_report_autovac(Oid dboid);
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extern void pgstat_report_vacuum(Oid tableoid, bool shared, bool adopt_counts,
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