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Revert change to turn autovacuum on by default.
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@ -1,4 +1,4 @@
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<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.77 2006/08/29 02:11:29 momjian Exp $ -->
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<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.78 2006/08/29 11:37:47 petere Exp $ -->
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<chapter Id="runtime-config">
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<chapter Id="runtime-config">
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<title>Server Configuration</title>
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<title>Server Configuration</title>
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@ -383,7 +383,7 @@ SET ENABLE_SEQSCAN TO OFF;
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</para>
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</para>
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<para>
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<para>
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The default value is 3. The value must be less than the value of
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The default value is 2. The value must be less than the value of
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<varname>max_connections</varname>. This parameter can only be
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<varname>max_connections</varname>. This parameter can only be
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set at server start.
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set at server start.
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</para>
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</para>
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@ -2990,8 +2990,7 @@ SELECT * FROM parent WHERE key = 2400;
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<listitem>
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<listitem>
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<para>
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<para>
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Enables the collection of row-level statistics on database
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Enables the collection of row-level statistics on database
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activity. This parameter is on by default, because the autovacuum
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activity. This parameter is off by default.
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daemon needs the collected information.
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Only superusers can change this setting.
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Only superusers can change this setting.
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</para>
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</para>
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</listitem>
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</listitem>
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@ -3114,7 +3113,7 @@ SELECT * FROM parent WHERE key = 2400;
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<para>
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<para>
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Specifies the minimum number of updated or deleted tuples needed
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Specifies the minimum number of updated or deleted tuples needed
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to trigger a <command>VACUUM</> in any one table.
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to trigger a <command>VACUUM</> in any one table.
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The default is 500.
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The default is 1000.
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This parameter can only be set in the <filename>postgresql.conf</>
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This parameter can only be set in the <filename>postgresql.conf</>
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file or on the server command line.
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file or on the server command line.
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This setting can be overridden for individual tables by entries in
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This setting can be overridden for individual tables by entries in
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@ -3132,7 +3131,7 @@ SELECT * FROM parent WHERE key = 2400;
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<para>
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<para>
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Specifies the minimum number of inserted, updated or deleted tuples
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Specifies the minimum number of inserted, updated or deleted tuples
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needed to trigger an <command>ANALYZE</> in any one table.
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needed to trigger an <command>ANALYZE</> in any one table.
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The default is 250.
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The default is 500.
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This parameter can only be set in the <filename>postgresql.conf</>
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This parameter can only be set in the <filename>postgresql.conf</>
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file or on the server command line.
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file or on the server command line.
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This setting can be overridden for individual tables by entries in
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This setting can be overridden for individual tables by entries in
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@ -3151,7 +3150,7 @@ SELECT * FROM parent WHERE key = 2400;
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Specifies a fraction of the table size to add to
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Specifies a fraction of the table size to add to
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<varname>autovacuum_vacuum_threshold</varname>
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<varname>autovacuum_vacuum_threshold</varname>
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when deciding whether to trigger a <command>VACUUM</>.
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when deciding whether to trigger a <command>VACUUM</>.
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The default is 0.2.
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The default is 0.4.
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This parameter can only be set in the <filename>postgresql.conf</>
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This parameter can only be set in the <filename>postgresql.conf</>
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file or on the server command line.
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file or on the server command line.
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This setting can be overridden for individual tables by entries in
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This setting can be overridden for individual tables by entries in
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@ -3170,7 +3169,7 @@ SELECT * FROM parent WHERE key = 2400;
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Specifies a fraction of the table size to add to
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Specifies a fraction of the table size to add to
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<varname>autovacuum_analyze_threshold</varname>
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<varname>autovacuum_analyze_threshold</varname>
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when deciding whether to trigger an <command>ANALYZE</>.
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when deciding whether to trigger an <command>ANALYZE</>.
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The default is 0.1.
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The default is 0.2.
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This parameter can only be set in the <filename>postgresql.conf</>
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This parameter can only be set in the <filename>postgresql.conf</>
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file or on the server command line.
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file or on the server command line.
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This setting can be overridden for individual tables by entries in
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This setting can be overridden for individual tables by entries in
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@ -1,4 +1,4 @@
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<!-- $PostgreSQL: pgsql/doc/src/sgml/maintenance.sgml,v 1.60 2006/08/28 13:37:18 petere Exp $ -->
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<!-- $PostgreSQL: pgsql/doc/src/sgml/maintenance.sgml,v 1.61 2006/08/29 11:37:47 petere Exp $ -->
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<chapter id="maintenance">
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<chapter id="maintenance">
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<title>Routine Database Maintenance Tasks</title>
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<title>Routine Database Maintenance Tasks</title>
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@ -447,14 +447,14 @@ HINT: Stop the postmaster and use a standalone backend to VACUUM in "mydb".
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</sect2>
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</sect2>
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<sect2 id="autovacuum">
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<sect2 id="autovacuum">
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<title id="autovacuum-title">The autovacuum daemon</title>
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<title id="autovacuum-title">The auto-vacuum daemon</title>
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<indexterm>
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<indexterm>
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<primary>autovacuum</primary>
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<primary>autovacuum</primary>
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<secondary>general information</secondary>
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<secondary>general information</secondary>
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</indexterm>
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</indexterm>
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<para>
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<para>
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There is a
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Beginning in <productname>PostgreSQL </productname> 8.1, there is a
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separate optional server process called the <firstterm>autovacuum
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separate optional server process called the <firstterm>autovacuum
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daemon</firstterm>, whose purpose is to automate the execution of
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daemon</firstterm>, whose purpose is to automate the execution of
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<command>VACUUM</command> and <command>ANALYZE </command> commands.
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<command>VACUUM</command> and <command>ANALYZE </command> commands.
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@ -465,9 +465,7 @@ HINT: Stop the postmaster and use a standalone backend to VACUUM in "mydb".
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linkend="guc-stats-start-collector"> and <xref
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linkend="guc-stats-start-collector"> and <xref
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linkend="guc-stats-row-level"> are set to <literal>true</literal>. Also,
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linkend="guc-stats-row-level"> are set to <literal>true</literal>. Also,
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it's important to allow a slot for the autovacuum process when choosing
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it's important to allow a slot for the autovacuum process when choosing
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the value of <xref linkend="guc-superuser-reserved-connections">. In
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the value of <xref linkend="guc-superuser-reserved-connections">.
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the default configuration, autovacuuming is enabled and the related
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configuration parameters are appropriately set.
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</para>
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</para>
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<para>
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<para>
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@ -10,7 +10,7 @@
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* Written by Peter Eisentraut <peter_e@gmx.net>.
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* Written by Peter Eisentraut <peter_e@gmx.net>.
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*
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*
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* IDENTIFICATION
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.344 2006/08/28 13:37:18 petere Exp $
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* $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.345 2006/08/29 11:37:47 petere Exp $
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*
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*
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*--------------------------------------------------------------------
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*--------------------------------------------------------------------
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*/
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*/
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@ -707,7 +707,7 @@ static struct config_bool ConfigureNamesBool[] =
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NULL
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NULL
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},
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},
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&pgstat_collect_tuplelevel,
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&pgstat_collect_tuplelevel,
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true, NULL, NULL
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false, NULL, NULL
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},
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},
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{
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{
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{"stats_block_level", PGC_SUSET, STATS_COLLECTOR,
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{"stats_block_level", PGC_SUSET, STATS_COLLECTOR,
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@ -744,7 +744,7 @@ static struct config_bool ConfigureNamesBool[] =
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NULL
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NULL
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},
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},
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&autovacuum_start_daemon,
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&autovacuum_start_daemon,
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true, NULL, NULL
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false, NULL, NULL
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},
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},
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{
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{
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@ -1138,7 +1138,7 @@ static struct config_int ConfigureNamesInt[] =
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NULL
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NULL
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},
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},
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&ReservedBackends,
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&ReservedBackends,
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3, 0, INT_MAX / 4, NULL, NULL
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2, 0, INT_MAX / 4, NULL, NULL
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},
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},
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{
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{
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@ -1563,7 +1563,7 @@ static struct config_int ConfigureNamesInt[] =
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NULL
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NULL
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},
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},
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&autovacuum_vac_thresh,
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&autovacuum_vac_thresh,
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500, 0, INT_MAX, NULL, NULL
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1000, 0, INT_MAX, NULL, NULL
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},
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},
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{
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{
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{"autovacuum_analyze_threshold", PGC_SIGHUP, AUTOVACUUM,
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{"autovacuum_analyze_threshold", PGC_SIGHUP, AUTOVACUUM,
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@ -1571,7 +1571,7 @@ static struct config_int ConfigureNamesInt[] =
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NULL
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NULL
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},
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},
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&autovacuum_anl_thresh,
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&autovacuum_anl_thresh,
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250, 0, INT_MAX, NULL, NULL
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500, 0, INT_MAX, NULL, NULL
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},
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},
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{
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{
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@ -1726,7 +1726,7 @@ static struct config_real ConfigureNamesReal[] =
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NULL
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NULL
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},
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},
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&autovacuum_vac_scale,
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&autovacuum_vac_scale,
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0.2, 0.0, 100.0, NULL, NULL
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0.4, 0.0, 100.0, NULL, NULL
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},
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},
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{
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{
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{"autovacuum_analyze_scale_factor", PGC_SIGHUP, AUTOVACUUM,
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{"autovacuum_analyze_scale_factor", PGC_SIGHUP, AUTOVACUUM,
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@ -1734,7 +1734,7 @@ static struct config_real ConfigureNamesReal[] =
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NULL
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NULL
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},
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},
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&autovacuum_anl_scale,
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&autovacuum_anl_scale,
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0.1, 0.0, 100.0, NULL, NULL
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0.2, 0.0, 100.0, NULL, NULL
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},
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},
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/* End-of-list marker */
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/* End-of-list marker */
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@ -59,7 +59,7 @@
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# Note: increasing max_connections costs ~400 bytes of shared memory per
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# Note: increasing max_connections costs ~400 bytes of shared memory per
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# connection slot, plus lock space (see max_locks_per_transaction). You
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# connection slot, plus lock space (see max_locks_per_transaction). You
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# might also need to raise shared_buffers to support more connections.
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# might also need to raise shared_buffers to support more connections.
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#superuser_reserved_connections = 3 # (change requires restart)
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#superuser_reserved_connections = 2 # (change requires restart)
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#unix_socket_directory = '' # (change requires restart)
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#unix_socket_directory = '' # (change requires restart)
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#unix_socket_group = '' # (change requires restart)
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#unix_socket_group = '' # (change requires restart)
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#unix_socket_permissions = 0777 # octal
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#unix_socket_permissions = 0777 # octal
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@ -345,7 +345,7 @@
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#stats_start_collector = on # needed for block or row stats
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#stats_start_collector = on # needed for block or row stats
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# (change requires restart)
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# (change requires restart)
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#stats_block_level = off
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#stats_block_level = off
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#stats_row_level = on
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#stats_row_level = off
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#stats_reset_on_server_start = off # (change requires restart)
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#stats_reset_on_server_start = off # (change requires restart)
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@ -361,15 +361,15 @@
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# AUTOVACUUM PARAMETERS
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# AUTOVACUUM PARAMETERS
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#---------------------------------------------------------------------------
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#---------------------------------------------------------------------------
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#autovacuum = on # enable autovacuum subprocess?
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#autovacuum = off # enable autovacuum subprocess?
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#autovacuum_naptime = 60 # time between autovacuum runs, in secs
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#autovacuum_naptime = 60 # time between autovacuum runs, in secs
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#autovacuum_vacuum_threshold = 500 # min # of tuple updates before
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#autovacuum_vacuum_threshold = 1000 # min # of tuple updates before
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# vacuum
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# vacuum
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#autovacuum_analyze_threshold = 250 # min # of tuple updates before
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#autovacuum_analyze_threshold = 500 # min # of tuple updates before
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# analyze
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# analyze
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#autovacuum_vacuum_scale_factor = 0.2 # fraction of rel size before
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#autovacuum_vacuum_scale_factor = 0.4 # fraction of rel size before
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# vacuum
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# vacuum
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#autovacuum_analyze_scale_factor = 0.1 # fraction of rel size before
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#autovacuum_analyze_scale_factor = 0.2 # fraction of rel size before
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# analyze
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# analyze
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#autovacuum_vacuum_cost_delay = -1 # default vacuum cost delay for
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#autovacuum_vacuum_cost_delay = -1 # default vacuum cost delay for
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# autovac, -1 means use
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# autovac, -1 means use
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