Enable configurable log of autovacuum actions. Initial patch from Simon
Riggs, additional code and docs by me. Per discussion.
This commit is contained in:
Alvaro Herrera
parent
432ea3cffd
commit
ef23a77441
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@ -1,4 +1,4 @@
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<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.120 2007/04/16 18:29:50 alvherre Exp $ -->
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<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.121 2007/04/18 16:44:17 alvherre Exp $ -->
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<chapter Id="runtime-config">
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<title>Server Configuration</title>
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@ -3190,6 +3190,25 @@ SELECT * FROM parent WHERE key = 2400;
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</listitem>
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</varlistentry>
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<varlistentry id="guc-log-autovacuum" xreflabel="log_autovacuum">
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<term><varname>log_autovacuum</varname> (<type>integer</type>)</term>
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<indexterm>
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<primary><varname>log_autovacuum</> configuration parameter</primary>
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</indexterm>
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<listitem>
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<para>
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Causes actions executed by autovacuum to be logged if it ran for at
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least the specified number of milliseconds. Setting this to zero prints
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all action durations. Minus-one (the default) disables logging
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autovacuum action durations. For example, if you set it to
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<literal>250ms</literal> then all vacuums and analyzes that run
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250ms or longer will be logged. Enabling this parameter can be helpful
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in tracking autovacuum activity. This setting can only be set in
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the <filename>postgresql.conf</> file or on the server command line.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry id="guc-autovacuum-naptime" xreflabel="autovacuum_naptime">
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<term><varname>autovacuum_naptime</varname> (<type>integer</type>)</term>
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<indexterm>
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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/commands/analyze.c,v 1.104 2007/04/06 04:21:42 tgl Exp $
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* $PostgreSQL: pgsql/src/backend/commands/analyze.c,v 1.105 2007/04/18 16:44:17 alvherre Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -22,6 +22,7 @@
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#include "catalog/index.h"
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#include "catalog/indexing.h"
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#include "catalog/namespace.h"
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#include "commands/dbcommands.h"
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#include "commands/vacuum.h"
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#include "executor/executor.h"
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#include "miscadmin.h"
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@ -29,10 +30,12 @@
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#include "parser/parse_oper.h"
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#include "parser/parse_relation.h"
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#include "pgstat.h"
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#include "postmaster/autovacuum.h"
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#include "utils/acl.h"
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#include "utils/datum.h"
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#include "utils/lsyscache.h"
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#include "utils/memutils.h"
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#include "utils/pg_rusage.h"
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#include "utils/syscache.h"
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#include "utils/tuplesort.h"
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@ -109,6 +112,8 @@ analyze_rel(Oid relid, VacuumStmt *vacstmt)
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double totalrows,
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totaldeadrows;
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HeapTuple *rows;
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PGRUsage ru0;
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TimestampTz starttime = 0;
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if (vacstmt->verbose)
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elevel = INFO;
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@ -190,6 +195,14 @@ analyze_rel(Oid relid, VacuumStmt *vacstmt)
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return;
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}
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/* measure elapsed time iff autovacuum logging requires it */
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if (IsAutoVacuumWorkerProcess() && Log_autovacuum >= 0)
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{
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pg_rusage_init(&ru0);
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if (Log_autovacuum > 0)
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starttime = GetCurrentTimestamp();
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}
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ereport(elevel,
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(errmsg("analyzing \"%s.%s\"",
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get_namespace_name(RelationGetNamespace(onerel)),
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@ -451,6 +464,34 @@ analyze_rel(Oid relid, VacuumStmt *vacstmt)
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* expose us to concurrent-update failures in update_attstats.)
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*/
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relation_close(onerel, NoLock);
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/* Log the action if appropriate */
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if (IsAutoVacuumWorkerProcess() && Log_autovacuum >= 0)
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{
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long diff;
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if (Log_autovacuum > 0)
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{
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TimestampTz endtime;
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int usecs;
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long secs;
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endtime = GetCurrentTimestamp();
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TimestampDifference(starttime, endtime, &secs, &usecs);
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diff = secs * 1000 + usecs / 1000;
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}
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if (Log_autovacuum == 0 || diff >= Log_autovacuum)
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{
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ereport(LOG,
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(errmsg("automatic analyze of table \"%s.%s.%s\" system usage: %s",
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get_database_name(MyDatabaseId),
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get_namespace_name(RelationGetNamespace(onerel)),
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RelationGetRelationName(onerel),
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pg_rusage_show(&ru0))));
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}
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}
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}
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/*
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@ -36,7 +36,7 @@
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*
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/commands/vacuumlazy.c,v 1.85 2007/02/21 22:47:45 momjian Exp $
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* $PostgreSQL: pgsql/src/backend/commands/vacuumlazy.c,v 1.86 2007/04/18 16:44:18 alvherre Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -47,9 +47,11 @@
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#include "access/genam.h"
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#include "access/heapam.h"
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#include "access/transam.h"
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#include "commands/dbcommands.h"
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#include "commands/vacuum.h"
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#include "miscadmin.h"
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#include "pgstat.h"
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#include "postmaster/autovacuum.h"
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#include "storage/freespace.h"
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#include "utils/lsyscache.h"
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#include "utils/memutils.h"
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@ -90,6 +92,7 @@ typedef struct LVRelStats
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int max_free_pages; /* # slots allocated in array */
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PageFreeSpaceInfo *free_pages; /* array or heap of blkno/avail */
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BlockNumber tot_free_pages; /* total pages with >= threshold space */
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int num_index_scans;
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} LVRelStats;
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@ -141,6 +144,14 @@ lazy_vacuum_rel(Relation onerel, VacuumStmt *vacstmt)
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Relation *Irel;
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int nindexes;
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BlockNumber possibly_freeable;
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PGRUsage ru0;
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TimestampTz starttime = 0;
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pg_rusage_init(&ru0);
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/* measure elapsed time iff autovacuum logging requires it */
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if (IsAutoVacuumWorkerProcess() && Log_autovacuum > 0)
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starttime = GetCurrentTimestamp();
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if (vacstmt->verbose)
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elevel = INFO;
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@ -156,6 +167,8 @@ lazy_vacuum_rel(Relation onerel, VacuumStmt *vacstmt)
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/* XXX should we scale it up or down? Adjust vacuum.c too, if so */
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vacrelstats->threshold = GetAvgFSMRequestSize(&onerel->rd_node);
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vacrelstats->num_index_scans = 0;
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/* Open all indexes of the relation */
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vac_open_indexes(onerel, RowExclusiveLock, &nindexes, &Irel);
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vacrelstats->hasindex = (nindexes > 0);
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@ -200,6 +213,40 @@ lazy_vacuum_rel(Relation onerel, VacuumStmt *vacstmt)
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/* report results to the stats collector, too */
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pgstat_report_vacuum(RelationGetRelid(onerel), onerel->rd_rel->relisshared,
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vacstmt->analyze, vacrelstats->rel_tuples);
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/* and log the action if appropriate */
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if (IsAutoVacuumWorkerProcess() && Log_autovacuum >= 0)
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{
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long diff;
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if (Log_autovacuum > 0)
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{
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TimestampTz endtime;
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int usecs;
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long secs;
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endtime = GetCurrentTimestamp();
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TimestampDifference(starttime, endtime, &secs, &usecs);
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diff = secs * 1000 + usecs / 1000;
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}
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if (Log_autovacuum == 0 || diff >= Log_autovacuum)
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{
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ereport(LOG,
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(errmsg("automatic vacuum of table \"%s.%s.%s\": index scans: %d\n"
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"pages: %d removed, %d remain\n"
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"tuples: %.0f removed, %.0f remain\n"
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"system usage: %s",
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get_database_name(MyDatabaseId),
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get_namespace_name(RelationGetNamespace(onerel)),
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RelationGetRelationName(onerel),
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vacrelstats->num_index_scans,
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vacrelstats->pages_removed, vacrelstats->rel_pages,
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vacrelstats->tuples_deleted, vacrelstats->rel_tuples,
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pg_rusage_show(&ru0))));
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}
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}
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}
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@ -282,6 +329,7 @@ lazy_scan_heap(Relation onerel, LVRelStats *vacrelstats,
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lazy_vacuum_heap(onerel, vacrelstats);
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/* Forget the now-vacuumed tuples, and press on */
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vacrelstats->num_dead_tuples = 0;
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vacrelstats->num_index_scans++;
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}
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buf = ReadBuffer(onerel, blkno);
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@ -490,6 +538,7 @@ lazy_scan_heap(Relation onerel, LVRelStats *vacrelstats,
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vacrelstats);
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/* Remove tuples from heap */
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lazy_vacuum_heap(onerel, vacrelstats);
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vacrelstats->num_index_scans++;
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}
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/* Do post-vacuum cleanup and statistics update for each index */
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@ -10,7 +10,7 @@
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*
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/postmaster/autovacuum.c,v 1.41 2007/04/16 18:29:52 alvherre Exp $
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* $PostgreSQL: pgsql/src/backend/postmaster/autovacuum.c,v 1.42 2007/04/18 16:44:18 alvherre Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -71,6 +71,8 @@ int autovacuum_freeze_max_age;
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int autovacuum_vac_cost_delay;
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int autovacuum_vac_cost_limit;
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int Log_autovacuum = -1;
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/* Flags to tell if we are in an autovacuum process */
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static bool am_autovacuum_launcher = false;
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static bool am_autovacuum_worker = false;
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@ -1814,7 +1816,6 @@ do_autovacuum(void)
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{
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Oid relid = lfirst_oid(cell);
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autovac_table *tab;
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char *relname;
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WorkerInfo worker;
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bool skipit;
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@ -1891,12 +1892,6 @@ next_worker:
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VacuumCostDelay = tab->at_vacuum_cost_delay;
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VacuumCostLimit = tab->at_vacuum_cost_limit;
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relname = get_rel_name(relid);
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elog(DEBUG2, "autovac: will%s%s %s",
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(tab->at_dovacuum ? " VACUUM" : ""),
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(tab->at_doanalyze ? " ANALYZE" : ""),
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relname);
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/*
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* Advertise my cost delay parameters for the balancing algorithm, and
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* do a balance
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@ -1915,7 +1910,6 @@ next_worker:
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tab->at_freeze_min_age);
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/* be tidy */
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pfree(tab);
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pfree(relname);
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}
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/*
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@ -10,7 +10,7 @@
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* Written by Peter Eisentraut <peter_e@gmx.net>.
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.385 2007/04/16 18:29:55 alvherre Exp $
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* $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.386 2007/04/18 16:44:18 alvherre Exp $
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*
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*--------------------------------------------------------------------
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*/
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@ -1505,6 +1505,17 @@ static struct config_int ConfigureNamesInt[] =
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-1, -1, INT_MAX / 1000, NULL, NULL
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},
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{
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{"log_autovacuum", PGC_BACKEND, LOGGING_WHAT,
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gettext_noop("Sets the minimum execution time above which autovacuum actions "
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"will be logged."),
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gettext_noop("Zero prints all actions. The default is -1 (turning this feature off)."),
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GUC_UNIT_MS
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},
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&Log_autovacuum,
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-1, -1, INT_MAX / 1000, NULL, NULL
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},
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{
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{"bgwriter_delay", PGC_SIGHUP, RESOURCES,
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gettext_noop("Background writer sleep time between rounds."),
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@ -376,8 +376,11 @@
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#autovacuum = on # enable autovacuum subprocess?
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# 'on' requires stats_start_collector
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# and stats_row_level to also be on
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#autovacuum_max_workers = 3 # max # of autovacuum subprocesses
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#autovacuum_max_workers = 3 # max # of autovacuum subprocesses
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#autovacuum_naptime = 1min # time between autovacuum runs
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#log_autovacuum = -1 # -1 is disabled, 0 logs all actions
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# and their durations, > 0 logs only
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# actions running at least N msec.
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#autovacuum_vacuum_threshold = 500 # min # of tuple updates before
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# vacuum
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#autovacuum_analyze_threshold = 250 # min # of tuple updates before
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@ -7,7 +7,7 @@
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* Portions Copyright (c) 1996-2007, 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/postmaster/autovacuum.h,v 1.9 2007/04/16 18:30:03 alvherre Exp $
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* $PostgreSQL: pgsql/src/include/postmaster/autovacuum.h,v 1.10 2007/04/18 16:44:18 alvherre Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -31,6 +31,8 @@ extern int autovacuum_vac_cost_limit;
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/* autovacuum launcher PID, only valid when worker is shutting down */
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extern int AutovacuumLauncherPid;
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extern int Log_autovacuum;
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/* Status inquiry functions */
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extern bool AutoVacuumingActive(void);
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extern bool IsAutoVacuumLauncherProcess(void);
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