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Simplify and rename some GUC variables, per various recent discussions:
* stats_start_collector goes away; we always start the collector process, unless prevented by a problem with setting up the stats UDP socket. * stats_reset_on_server_start goes away; it seems useless in view of the availability of pg_stat_reset(). * stats_block_level and stats_row_level are merged into a single variable "track_counts", which controls all reports sent to the collector process. * stats_command_string is renamed to track_activities. * log_autovacuum is renamed to log_autovacuum_min_duration to better reflect its meaning. The log_autovacuum change is not a compatibility issue since it didn't exist before 8.3 anyway. The other changes need to be release-noted.
This commit is contained in:
Tom Lane
parent
02138357ff
commit
48f7e64395
@ -1,4 +1,4 @@
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<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.145 2007/09/22 19:10:44 tgl Exp $ -->
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<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.146 2007/09/24 03:12:23 tgl Exp $ -->
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<chapter Id="runtime-config">
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<title>Server Configuration</title>
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@ -3186,30 +3186,19 @@ COPY postgres_log FROM '/full/path/to/logfile.csv' WITH csv;
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<title>Query and Index Statistics Collector</title>
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<para>
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These parameters control a server-wide statistics collection feature.
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These parameters control server-wide statistics collection features.
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When statistics collection is enabled, the data that is produced can be
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accessed via the <structname>pg_stat</structname> and
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<structname>pg_statio</structname> family of system views.
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Refer to <xref linkend="monitoring"> for more information.
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</para>
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<note>
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<para>
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As of <productname>PostgreSQL</productname> 8.2,
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<varname>stats_command_string</varname> controls a separate data
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collection mechanism that can be turned on or off independently
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of whether the statistics-collection subprocess is running.
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The subprocess is only needed to support collection of
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block-level or row-level statistics.
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</para>
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</note>
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<variablelist>
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<varlistentry id="guc-stats-command-string" xreflabel="stats_command_string">
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<term><varname>stats_command_string</varname> (<type>boolean</type>)</term>
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<varlistentry id="guc-track-activities" xreflabel="track_activities">
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<term><varname>track_activities</varname> (<type>boolean</type>)</term>
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<indexterm>
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<primary><varname>stats_command_string</> configuration parameter</primary>
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<primary><varname>track_activities</> configuration parameter</primary>
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</indexterm>
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<listitem>
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<para>
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@ -3225,6 +3214,21 @@ COPY postgres_log FROM '/full/path/to/logfile.csv' WITH csv;
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</listitem>
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</varlistentry>
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<varlistentry id="guc-track-counts" xreflabel="track_counts">
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<term><varname>track_counts</varname> (<type>boolean</type>)</term>
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<indexterm>
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<primary><varname>track_counts</> configuration parameter</primary>
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</indexterm>
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<listitem>
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<para>
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Enables collection of statistics on database activity.
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This parameter is on by default, because the autovacuum
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daemon needs the collected information.
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Only superusers can change this setting.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry id="guc-update-process-title" xreflabel="update_process_title">
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<term><varname>update_process_title</varname> (<type>boolean</type>)</term>
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<indexterm>
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@ -3234,75 +3238,13 @@ COPY postgres_log FROM '/full/path/to/logfile.csv' WITH csv;
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<para>
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Enables updating of the process title every time a new SQL command
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is received by the server. The process title is typically viewed
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by the <command>ps</> command or in Windows using the <application>Process
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Explorer</>. Only superusers can change this setting.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry id="guc-stats-start-collector" xreflabel="stats_start_collector">
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<term><varname>stats_start_collector</varname> (<type>boolean</type>)</term>
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<indexterm>
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<primary><varname>stats_start_collector</> configuration parameter</primary>
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</indexterm>
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<listitem>
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<para>
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Controls whether the server should start the
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statistics-collection subprocess. This is on by default, but
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can be turned off if you know you have no interest in
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collecting statistics or running autovacuum.
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This parameter can only be set at server start, because the collection
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subprocess cannot be started or stopped on-the-fly. (However, the
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extent to which statistics are actually gathered can be changed while
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the server is running, so long as the subprocess exists.)
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</para>
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</listitem>
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</varlistentry>
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<varlistentry id="guc-stats-block-level" xreflabel="stats_block_level">
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<term><varname>stats_block_level</varname> (<type>boolean</type>)</term>
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<indexterm>
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<primary><varname>stats_block_level</> configuration parameter</primary>
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</indexterm>
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<listitem>
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<para>
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Enables the collection of block-level statistics on database
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activity. This parameter is off by default.
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by the <command>ps</> command,
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or in Windows by using the <application>Process Explorer</>.
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Only superusers can change this setting.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry id="guc-stats-row-level" xreflabel="stats_row_level">
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<term><varname>stats_row_level</varname> (<type>boolean</type>)</term>
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<indexterm>
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<primary><varname>stats_row_level</> configuration parameter</primary>
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</indexterm>
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<listitem>
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<para>
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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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daemon needs the collected information.
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Only superusers can change this setting.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry id="guc-stats-reset-on-server-start" xreflabel="stats_reset_on_server_start">
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<term><varname>stats_reset_on_server_start</varname> (<type>boolean</type>)</term>
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<indexterm>
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<primary><varname>stats_reset_on_server_start</> configuration parameter</primary>
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</indexterm>
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<listitem>
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<para>
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If on, collected block-level and row-level statistics are zeroed out
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whenever the server is restarted. If off, statistics are accumulated
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across server restarts. This parameter is off by default.
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This parameter can only be set at server start.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</sect2>
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@ -3369,21 +3311,40 @@ COPY postgres_log FROM '/full/path/to/logfile.csv' WITH csv;
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<listitem>
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<para>
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Controls whether the server should run the
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autovacuum launcher daemon. This is on by default.
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<varname>stats_start_collector</> and <varname>stats_row_level</>
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must also be turned on for autovacuum to work.
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autovacuum launcher daemon. This is on by default; however,
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<xref linkend="guc-track-counts"> must also be turned on for
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autovacuum to work.
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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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</para>
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<para>
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Note that even when this parameter is disabled, the system
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will periodically launch autovacuum processes in order to
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will launch autovacuum processes if necessary to
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prevent transaction ID wraparound. See <xref
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linkend="vacuum-for-wraparound"> for more information.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry id="guc-log-autovacuum-min-duration" xreflabel="log_autovacuum_min_duration">
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<term><varname>log_autovacuum_min_duration</varname> (<type>integer</type>)</term>
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<indexterm>
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<primary><varname>log_autovacuum_min_duration</> configuration parameter</primary>
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</indexterm>
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<listitem>
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<para>
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Causes each action 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 logs
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all autovacuum actions. Minus-one (the default) disables logging
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autovacuum actions. For example, if you set this to
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<literal>250ms</literal> then all automatic 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-max-workers" xreflabel="autovacuum_max_workers">
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<term><varname>autovacuum_max_workers</varname> (<type>integer</type>)</term>
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<indexterm>
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@ -3393,26 +3354,7 @@ COPY postgres_log FROM '/full/path/to/logfile.csv' WITH csv;
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<para>
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Specifies the maximum number of autovacuum processes (other than the
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autovacuum launcher) which may be running at any one time. The default
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is three (<literal>3</literal>). This parameter 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-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 each action 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 logs
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all autovacuum actions. Minus-one (the default) disables logging
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autovacuum actions. For example, if you set this 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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is three. This parameter 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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@ -1,4 +1,4 @@
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<!-- $PostgreSQL: pgsql/doc/src/sgml/maintenance.sgml,v 1.81 2007/09/14 13:43:03 momjian Exp $ -->
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<!-- $PostgreSQL: pgsql/doc/src/sgml/maintenance.sgml,v 1.82 2007/09/24 03:12:23 tgl Exp $ -->
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<chapter id="maintenance">
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<title>Routine Database Maintenance Tasks</title>
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@ -203,7 +203,7 @@
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</sect2>
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<sect2 id="vacuum-for-statistics">
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<title>Updating planner statistics</title>
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<title>Updating Planner Statistics</title>
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<indexterm zone="vacuum-for-statistics">
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<primary>statistics</primary>
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@ -279,7 +279,7 @@
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</sect2>
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<sect2 id="vacuum-for-wraparound">
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<title>Preventing transaction ID wraparound failures</title>
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<title>Preventing Transaction ID Wraparound Failures</title>
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<indexterm zone="vacuum-for-wraparound">
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<primary>transaction ID</primary>
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@ -460,7 +460,7 @@ HINT: Stop the postmaster and use a standalone backend to VACUUM in "mydb".
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</sect2>
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<sect2 id="autovacuum">
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<title id="autovacuum-title">The auto-vacuum daemon</title>
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<title id="autovacuum-title">The Auto-Vacuum Daemon</title>
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<indexterm>
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<primary>autovacuum</primary>
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@ -473,10 +473,9 @@ HINT: Stop the postmaster and use a standalone backend to VACUUM in "mydb".
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<command>VACUUM</command> and <command>ANALYZE </command> commands.
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When enabled, autovacuum checks for
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tables that have had a large number of inserted, updated or deleted
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tuples. These checks use the row-level statistics collection facility;
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tuples. These checks use the statistics collection facility;
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therefore, autovacuum cannot be used unless <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>.
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linkend="guc-track-counts"> is set to <literal>true</literal>.
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In 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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@ -497,8 +496,8 @@ HINT: Stop the postmaster and use a standalone backend to VACUUM in "mydb".
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eligible for vacuuming in a short amount of time, all autovacuum workers
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may end up vacuuming those tables for a very long time. This would result
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in other tables and databases not being vacuumed until a worker became
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available. There is also not a limit on how many workers might be in a
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single database, but workers do try and avoid repeating work that has
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available. There is not a limit on how many workers might be in a
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single database, but workers do try to avoid repeating work that has
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already been done by other workers. Note that the number of running
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workers does not count towards the <xref linkend="guc-max-connections"> nor
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the <xref linkend="guc-superuser-reserved-connections"> limits.
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@ -1,4 +1,4 @@
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<!-- $PostgreSQL: pgsql/doc/src/sgml/monitoring.sgml,v 1.52 2007/09/20 17:56:30 tgl Exp $ -->
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<!-- $PostgreSQL: pgsql/doc/src/sgml/monitoring.sgml,v 1.53 2007/09/24 03:12:23 tgl Exp $ -->
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<chapter id="monitoring">
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<title>Monitoring Database Activity</title>
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@ -117,14 +117,15 @@ postgres: <replaceable>user</> <replaceable>database</> <replaceable>host</> <re
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<productname>PostgreSQL</productname>'s <firstterm>statistics collector</>
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is a subsystem that supports collection and reporting of information about
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server activity. Presently, the collector can count accesses to tables
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and indexes in both disk-block and individual-row terms.
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and indexes in both disk-block and individual-row terms. It also tracks
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total numbers of rows in each table, and the last vacuum and analyze times
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for each table.
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</para>
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<para>
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<productname>PostgreSQL</productname> also supports determining the exact
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command currently being executed by other server processes. This is an
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independent facility that can be enabled or disabled whether or not
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block-level and row-level statistics are being collected.
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independent facility that does not depend on the collector process.
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</para>
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<sect2 id="monitoring-stats-setup">
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@ -139,31 +140,14 @@ postgres: <replaceable>user</> <replaceable>database</> <replaceable>host</> <re
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</para>
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<para>
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The parameter <xref linkend="guc-stats-start-collector"> must be
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set to <literal>true</> for the statistics collector to be launched
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at all. This is the default and recommended setting, but it can be
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turned off if you have no interest in statistics and want to
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squeeze out every last drop of overhead. (The savings is likely to
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be small, however.) Note that this option cannot be changed while
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the server is running.
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The parameter <xref linkend="guc-track-counts"> controls whether
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information is actually sent to the collector process and thus determines
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whether any run-time overhead occurs for event counting.
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</para>
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<para>
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The parameters <xref linkend="guc-stats-block-level"> and <xref
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linkend="guc-stats-row-level"> control how much information is
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actually sent to the collector and thus determine how much run-time
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overhead occurs. These respectively determine whether a server
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process tracks disk-block-level access
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statistics and row-level access statistics and sends these to the collector.
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Additionally, per-database transaction commit and abort statistics
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are collected if either of these parameters are set.
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</para>
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<para>
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The parameter <xref linkend="guc-stats-command-string"> enables monitoring
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The parameter <xref linkend="guc-track-activities"> enables monitoring
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of the current command being executed by any server process.
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The statistics collector subprocess need not be running to enable this
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feature.
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</para>
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<para>
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@ -190,13 +174,13 @@ postgres: <replaceable>user</> <replaceable>database</> <replaceable>host</> <re
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<para>
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When using the statistics to monitor current activity, it is important
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to realize that the information does not update instantaneously.
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Each individual server process transmits new block and row access counts to
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Each individual server process transmits new statistical counts to
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the collector just before going idle; so a query or transaction still in
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progress does not affect the displayed totals. Also, the collector itself
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emits a new report at most once per <varname>PGSTAT_STAT_INTERVAL</varname>
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||||
milliseconds (500 unless altered while building the server). So the
|
||||
displayed information lags behind actual activity. However, current-query
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information collected by <varname>stats_command_string</varname> is
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information collected by <varname>track_activities</varname> is
|
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always up-to-date.
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</para>
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@ -240,7 +224,7 @@ postgres: <replaceable>user</> <replaceable>database</> <replaceable>host</> <re
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current query began execution, time at which the process was
|
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started, and client's address and port number. The columns that
|
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report data on the current query are available unless the parameter
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<varname>stats_command_string</varname> has been turned off.
|
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<varname>track_activities</varname> has been turned off.
|
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Furthermore, these columns are only visible if the user examining
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the view is a superuser or the same as the user owning the process
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being reported on.
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||||
@ -715,7 +699,7 @@ postgres: <replaceable>user</> <replaceable>database</> <replaceable>host</> <re
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||||
Active command of the given server process, but only if the
|
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current user is a superuser or the same user as that of
|
||||
the session being queried (and
|
||||
<varname>stats_command_string</varname> is on)
|
||||
<varname>track_activities</varname> is on)
|
||||
</entry>
|
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</row>
|
||||
|
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@ -726,7 +710,7 @@ postgres: <replaceable>user</> <replaceable>database</> <replaceable>host</> <re
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True if the given server process is waiting for a lock,
|
||||
but only if the current user is a superuser or the same user as that of
|
||||
the session being queried (and
|
||||
<varname>stats_command_string</varname> is on)
|
||||
<varname>track_activities</varname> is on)
|
||||
</entry>
|
||||
</row>
|
||||
|
||||
@ -738,7 +722,7 @@ postgres: <replaceable>user</> <replaceable>database</> <replaceable>host</> <re
|
||||
executing query was started, but only if the
|
||||
current user is a superuser or the same user as that of
|
||||
the session being queried (and
|
||||
<varname>stats_command_string</varname> is on)
|
||||
<varname>track_activities</varname> is on)
|
||||
</entry>
|
||||
</row>
|
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|
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@ -750,7 +734,7 @@ postgres: <replaceable>user</> <replaceable>database</> <replaceable>host</> <re
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executing transaction was started, but only if the
|
||||
current user is a superuser or the same user as that of
|
||||
the session being queried (and
|
||||
<varname>stats_command_string</varname> is on)
|
||||
<varname>track_activities</varname> is on)
|
||||
</entry>
|
||||
</row>
|
||||
|
||||
|
||||
@ -1,4 +1,4 @@
|
||||
<!-- $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.507 2007/09/16 03:03:00 tgl Exp $ -->
|
||||
<!-- $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.508 2007/09/24 03:12:23 tgl Exp $ -->
|
||||
<!--
|
||||
|
||||
Typical markup:
|
||||
@ -1475,8 +1475,7 @@ do it for earlier branch release files.
|
||||
<listitem>
|
||||
<para>
|
||||
Improve performance of statistics monitoring, especially
|
||||
<link
|
||||
linkend="guc-stats-command-string"><varname>stats_command_string</></link>
|
||||
<varname>stats_command_string</>
|
||||
(Tom, Bruce)
|
||||
</para>
|
||||
|
||||
|
||||
@ -8,7 +8,7 @@
|
||||
*
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $PostgreSQL: pgsql/src/backend/commands/analyze.c,v 1.108 2007/05/30 20:11:56 tgl Exp $
|
||||
* $PostgreSQL: pgsql/src/backend/commands/analyze.c,v 1.109 2007/09/24 03:12:23 tgl Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
@ -202,10 +202,10 @@ analyze_rel(Oid relid, VacuumStmt *vacstmt,
|
||||
}
|
||||
|
||||
/* measure elapsed time iff autovacuum logging requires it */
|
||||
if (IsAutoVacuumWorkerProcess() && Log_autovacuum >= 0)
|
||||
if (IsAutoVacuumWorkerProcess() && Log_autovacuum_min_duration >= 0)
|
||||
{
|
||||
pg_rusage_init(&ru0);
|
||||
if (Log_autovacuum > 0)
|
||||
if (Log_autovacuum_min_duration > 0)
|
||||
starttime = GetCurrentTimestamp();
|
||||
}
|
||||
|
||||
@ -472,11 +472,11 @@ analyze_rel(Oid relid, VacuumStmt *vacstmt,
|
||||
relation_close(onerel, NoLock);
|
||||
|
||||
/* Log the action if appropriate */
|
||||
if (IsAutoVacuumWorkerProcess() && Log_autovacuum >= 0)
|
||||
if (IsAutoVacuumWorkerProcess() && Log_autovacuum_min_duration >= 0)
|
||||
{
|
||||
if (Log_autovacuum == 0 ||
|
||||
if (Log_autovacuum_min_duration == 0 ||
|
||||
TimestampDifferenceExceeds(starttime, GetCurrentTimestamp(),
|
||||
Log_autovacuum))
|
||||
Log_autovacuum_min_duration))
|
||||
ereport(LOG,
|
||||
(errmsg("automatic analyze of table \"%s.%s.%s\" system usage: %s",
|
||||
get_database_name(MyDatabaseId),
|
||||
|
||||
@ -36,7 +36,7 @@
|
||||
*
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $PostgreSQL: pgsql/src/backend/commands/vacuumlazy.c,v 1.98 2007/09/20 21:43:27 tgl Exp $
|
||||
* $PostgreSQL: pgsql/src/backend/commands/vacuumlazy.c,v 1.99 2007/09/24 03:12:23 tgl Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
@ -154,7 +154,7 @@ lazy_vacuum_rel(Relation onerel, VacuumStmt *vacstmt,
|
||||
pg_rusage_init(&ru0);
|
||||
|
||||
/* measure elapsed time iff autovacuum logging requires it */
|
||||
if (IsAutoVacuumWorkerProcess() && Log_autovacuum > 0)
|
||||
if (IsAutoVacuumWorkerProcess() && Log_autovacuum_min_duration > 0)
|
||||
starttime = GetCurrentTimestamp();
|
||||
|
||||
if (vacstmt->verbose)
|
||||
@ -221,11 +221,11 @@ lazy_vacuum_rel(Relation onerel, VacuumStmt *vacstmt,
|
||||
vacstmt->analyze, vacrelstats->rel_tuples);
|
||||
|
||||
/* and log the action if appropriate */
|
||||
if (IsAutoVacuumWorkerProcess() && Log_autovacuum >= 0)
|
||||
if (IsAutoVacuumWorkerProcess() && Log_autovacuum_min_duration >= 0)
|
||||
{
|
||||
if (Log_autovacuum == 0 ||
|
||||
if (Log_autovacuum_min_duration == 0 ||
|
||||
TimestampDifferenceExceeds(starttime, GetCurrentTimestamp(),
|
||||
Log_autovacuum))
|
||||
Log_autovacuum_min_duration))
|
||||
ereport(LOG,
|
||||
(errmsg("automatic vacuum of table \"%s.%s.%s\": index scans: %d\n"
|
||||
"pages: %d removed, %d remain\n"
|
||||
|
||||
@ -55,7 +55,7 @@
|
||||
*
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $PostgreSQL: pgsql/src/backend/postmaster/autovacuum.c,v 1.59 2007/09/23 20:07:33 tgl Exp $
|
||||
* $PostgreSQL: pgsql/src/backend/postmaster/autovacuum.c,v 1.60 2007/09/24 03:12:23 tgl Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
@ -114,7 +114,7 @@ int autovacuum_freeze_max_age;
|
||||
int autovacuum_vac_cost_delay;
|
||||
int autovacuum_vac_cost_limit;
|
||||
|
||||
int Log_autovacuum = -1;
|
||||
int Log_autovacuum_min_duration = -1;
|
||||
|
||||
|
||||
/* Flags to tell if we are in an autovacuum process */
|
||||
@ -511,7 +511,7 @@ AutoVacLauncherMain(int argc, char *argv[])
|
||||
PG_SETMASK(&UnBlockSig);
|
||||
|
||||
/* in emergency mode, just start a worker and go away */
|
||||
if (!autovacuum_start_daemon)
|
||||
if (!AutoVacuumingActive())
|
||||
{
|
||||
do_start_worker();
|
||||
proc_exit(0); /* done */
|
||||
@ -590,7 +590,7 @@ AutoVacLauncherMain(int argc, char *argv[])
|
||||
ProcessConfigFile(PGC_SIGHUP);
|
||||
|
||||
/* shutdown requested in config file */
|
||||
if (!autovacuum_start_daemon)
|
||||
if (!AutoVacuumingActive())
|
||||
break;
|
||||
|
||||
/* rebalance in case the default cost parameters changed */
|
||||
@ -2625,8 +2625,7 @@ autovac_report_activity(VacuumStmt *vacstmt, Oid relid)
|
||||
bool
|
||||
AutoVacuumingActive(void)
|
||||
{
|
||||
if (!autovacuum_start_daemon || !pgstat_collect_startcollector ||
|
||||
!pgstat_collect_tuplelevel)
|
||||
if (!autovacuum_start_daemon || !pgstat_track_counts)
|
||||
return false;
|
||||
return true;
|
||||
}
|
||||
@ -2635,26 +2634,15 @@ AutoVacuumingActive(void)
|
||||
* autovac_init
|
||||
* This is called at postmaster initialization.
|
||||
*
|
||||
* Annoy the user if he got it wrong.
|
||||
* All we do here is annoy the user if he got it wrong.
|
||||
*/
|
||||
void
|
||||
autovac_init(void)
|
||||
{
|
||||
if (!autovacuum_start_daemon)
|
||||
return;
|
||||
|
||||
if (!pgstat_collect_startcollector || !pgstat_collect_tuplelevel)
|
||||
{
|
||||
if (autovacuum_start_daemon && !pgstat_track_counts)
|
||||
ereport(WARNING,
|
||||
(errmsg("autovacuum not started because of misconfiguration"),
|
||||
errhint("Enable options \"stats_start_collector\" and \"stats_row_level\".")));
|
||||
|
||||
/*
|
||||
* Set the GUC var so we don't fork autovacuum uselessly, and also to
|
||||
* help debugging.
|
||||
*/
|
||||
autovacuum_start_daemon = false;
|
||||
}
|
||||
errhint("Enable the \"track_counts\" option.")));
|
||||
}
|
||||
|
||||
/*
|
||||
|
||||
@ -13,7 +13,7 @@
|
||||
*
|
||||
* Copyright (c) 2001-2007, PostgreSQL Global Development Group
|
||||
*
|
||||
* $PostgreSQL: pgsql/src/backend/postmaster/pgstat.c,v 1.164 2007/09/20 17:56:31 tgl Exp $
|
||||
* $PostgreSQL: pgsql/src/backend/postmaster/pgstat.c,v 1.165 2007/09/24 03:12:23 tgl Exp $
|
||||
* ----------
|
||||
*/
|
||||
#include "postgres.h"
|
||||
@ -55,6 +55,7 @@
|
||||
#include "storage/ipc.h"
|
||||
#include "storage/pg_shmem.h"
|
||||
#include "storage/pmsignal.h"
|
||||
#include "utils/guc.h"
|
||||
#include "utils/memutils.h"
|
||||
#include "utils/ps_status.h"
|
||||
|
||||
@ -93,11 +94,8 @@
|
||||
* GUC parameters
|
||||
* ----------
|
||||
*/
|
||||
bool pgstat_collect_startcollector = true;
|
||||
bool pgstat_collect_resetonpmstart = false;
|
||||
bool pgstat_collect_tuplelevel = false;
|
||||
bool pgstat_collect_blocklevel = false;
|
||||
bool pgstat_collect_querystring = false;
|
||||
bool pgstat_track_activities = false;
|
||||
bool pgstat_track_counts = false;
|
||||
|
||||
/*
|
||||
* BgWriter global statistics counters (unused in other processes).
|
||||
@ -256,28 +254,6 @@ pgstat_init(void)
|
||||
|
||||
#define TESTBYTEVAL ((char) 199)
|
||||
|
||||
/*
|
||||
* Force start of collector daemon if something to collect. Note that
|
||||
* pgstat_collect_querystring is now an independent facility that does not
|
||||
* require the collector daemon.
|
||||
*/
|
||||
if (pgstat_collect_tuplelevel ||
|
||||
pgstat_collect_blocklevel)
|
||||
pgstat_collect_startcollector = true;
|
||||
|
||||
/*
|
||||
* If we don't have to start a collector or should reset the collected
|
||||
* statistics on postmaster start, simply remove the stats file.
|
||||
*/
|
||||
if (!pgstat_collect_startcollector || pgstat_collect_resetonpmstart)
|
||||
pgstat_reset_all();
|
||||
|
||||
/*
|
||||
* Nothing else required if collector will not get started
|
||||
*/
|
||||
if (!pgstat_collect_startcollector)
|
||||
return;
|
||||
|
||||
/*
|
||||
* Create the UDP socket for sending and receiving statistic messages
|
||||
*/
|
||||
@ -492,17 +468,19 @@ startup_failed:
|
||||
closesocket(pgStatSock);
|
||||
pgStatSock = -1;
|
||||
|
||||
/* Adjust GUC variables to suppress useless activity */
|
||||
pgstat_collect_startcollector = false;
|
||||
pgstat_collect_tuplelevel = false;
|
||||
pgstat_collect_blocklevel = false;
|
||||
/*
|
||||
* Adjust GUC variables to suppress useless activity, and for debugging
|
||||
* purposes (seeing track_counts off is a clue that we failed here).
|
||||
* We use PGC_S_OVERRIDE because there is no point in trying to turn it
|
||||
* back on from postgresql.conf without a restart.
|
||||
*/
|
||||
SetConfigOption("track_counts", "off", PGC_INTERNAL, PGC_S_OVERRIDE);
|
||||
}
|
||||
|
||||
/*
|
||||
* pgstat_reset_all() -
|
||||
*
|
||||
* Remove the stats file. This is used on server start if the
|
||||
* stats_reset_on_server_start feature is enabled, or if WAL
|
||||
* Remove the stats file. This is currently used only if WAL
|
||||
* recovery is needed after a crash.
|
||||
*/
|
||||
void
|
||||
@ -536,7 +514,7 @@ pgstat_forkexec(void)
|
||||
#endif /* EXEC_BACKEND */
|
||||
|
||||
|
||||
/* ----------
|
||||
/*
|
||||
* pgstat_start() -
|
||||
*
|
||||
* Called from postmaster at startup or after an existing collector
|
||||
@ -545,7 +523,6 @@ pgstat_forkexec(void)
|
||||
* Returns PID of child process, or 0 if fail.
|
||||
*
|
||||
* Note: if fail, we will be called again from the postmaster main loop.
|
||||
* ----------
|
||||
*/
|
||||
int
|
||||
pgstat_start(void)
|
||||
@ -554,9 +531,10 @@ pgstat_start(void)
|
||||
pid_t pgStatPid;
|
||||
|
||||
/*
|
||||
* Do nothing if no collector needed
|
||||
* Check that the socket is there, else pgstat_init failed and we can
|
||||
* do nothing useful.
|
||||
*/
|
||||
if (!pgstat_collect_startcollector)
|
||||
if (pgStatSock < 0)
|
||||
return 0;
|
||||
|
||||
/*
|
||||
@ -571,22 +549,6 @@ pgstat_start(void)
|
||||
return 0;
|
||||
last_pgstat_start_time = curtime;
|
||||
|
||||
/*
|
||||
* Check that the socket is there, else pgstat_init failed.
|
||||
*/
|
||||
if (pgStatSock < 0)
|
||||
{
|
||||
ereport(LOG,
|
||||
(errmsg("statistics collector startup skipped")));
|
||||
|
||||
/*
|
||||
* We can only get here if someone tries to manually turn
|
||||
* pgstat_collect_startcollector on after it had been off.
|
||||
*/
|
||||
pgstat_collect_startcollector = false;
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Okay, fork off the collector.
|
||||
*/
|
||||
@ -1052,8 +1014,7 @@ pgstat_report_vacuum(Oid tableoid, bool shared,
|
||||
{
|
||||
PgStat_MsgVacuum msg;
|
||||
|
||||
if (pgStatSock < 0 ||
|
||||
!pgstat_collect_tuplelevel)
|
||||
if (pgStatSock < 0 || !pgstat_track_counts)
|
||||
return;
|
||||
|
||||
pgstat_setheader(&msg.m_hdr, PGSTAT_MTYPE_VACUUM);
|
||||
@ -1078,8 +1039,7 @@ pgstat_report_analyze(Oid tableoid, bool shared, PgStat_Counter livetuples,
|
||||
{
|
||||
PgStat_MsgAnalyze msg;
|
||||
|
||||
if (pgStatSock < 0 ||
|
||||
!pgstat_collect_tuplelevel)
|
||||
if (pgStatSock < 0 || !pgstat_track_counts)
|
||||
return;
|
||||
|
||||
pgstat_setheader(&msg.m_hdr, PGSTAT_MTYPE_ANALYZE);
|
||||
@ -1139,9 +1099,7 @@ pgstat_initstats(Relation rel)
|
||||
return;
|
||||
}
|
||||
|
||||
if (pgStatSock < 0 ||
|
||||
!(pgstat_collect_tuplelevel ||
|
||||
pgstat_collect_blocklevel))
|
||||
if (pgStatSock < 0 || !pgstat_track_counts)
|
||||
{
|
||||
/* We're not counting at all */
|
||||
rel->pgstat_info = NULL;
|
||||
@ -1274,7 +1232,7 @@ pgstat_count_heap_insert(Relation rel)
|
||||
{
|
||||
PgStat_TableStatus *pgstat_info = rel->pgstat_info;
|
||||
|
||||
if (pgstat_collect_tuplelevel && pgstat_info != NULL)
|
||||
if (pgstat_track_counts && pgstat_info != NULL)
|
||||
{
|
||||
int nest_level = GetCurrentTransactionNestLevel();
|
||||
|
||||
@ -1298,7 +1256,7 @@ pgstat_count_heap_update(Relation rel, bool hot)
|
||||
{
|
||||
PgStat_TableStatus *pgstat_info = rel->pgstat_info;
|
||||
|
||||
if (pgstat_collect_tuplelevel && pgstat_info != NULL)
|
||||
if (pgstat_track_counts && pgstat_info != NULL)
|
||||
{
|
||||
int nest_level = GetCurrentTransactionNestLevel();
|
||||
|
||||
@ -1327,7 +1285,7 @@ pgstat_count_heap_delete(Relation rel)
|
||||
{
|
||||
PgStat_TableStatus *pgstat_info = rel->pgstat_info;
|
||||
|
||||
if (pgstat_collect_tuplelevel && pgstat_info != NULL)
|
||||
if (pgstat_track_counts && pgstat_info != NULL)
|
||||
{
|
||||
int nest_level = GetCurrentTransactionNestLevel();
|
||||
|
||||
@ -1356,7 +1314,7 @@ pgstat_update_heap_dead_tuples(Relation rel, int delta)
|
||||
{
|
||||
PgStat_TableStatus *pgstat_info = rel->pgstat_info;
|
||||
|
||||
if (pgstat_collect_tuplelevel && pgstat_info != NULL)
|
||||
if (pgstat_track_counts && pgstat_info != NULL)
|
||||
pgstat_info->t_counts.t_new_dead_tuples -= delta;
|
||||
}
|
||||
|
||||
@ -1931,7 +1889,7 @@ pgstat_report_activity(const char *cmd_str)
|
||||
TimestampTz start_timestamp;
|
||||
int len;
|
||||
|
||||
if (!pgstat_collect_querystring || !beentry)
|
||||
if (!pgstat_track_activities || !beentry)
|
||||
return;
|
||||
|
||||
/*
|
||||
@ -1967,7 +1925,7 @@ pgstat_report_xact_timestamp(TimestampTz tstamp)
|
||||
{
|
||||
volatile PgBackendStatus *beentry = MyBEEntry;
|
||||
|
||||
if (!pgstat_collect_querystring || !beentry)
|
||||
if (!pgstat_track_activities || !beentry)
|
||||
return;
|
||||
|
||||
/*
|
||||
@ -1995,7 +1953,7 @@ pgstat_report_waiting(bool waiting)
|
||||
{
|
||||
volatile PgBackendStatus *beentry = MyBEEntry;
|
||||
|
||||
if (!pgstat_collect_querystring || !beentry)
|
||||
if (!pgstat_track_activities || !beentry)
|
||||
return;
|
||||
|
||||
/*
|
||||
|
||||
@ -10,7 +10,7 @@
|
||||
* Written by Peter Eisentraut <peter_e@gmx.net>.
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.420 2007/09/11 00:06:42 tgl Exp $
|
||||
* $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.421 2007/09/24 03:12:23 tgl Exp $
|
||||
*
|
||||
*--------------------------------------------------------------------
|
||||
*/
|
||||
@ -736,47 +736,23 @@ static struct config_bool ConfigureNamesBool[] =
|
||||
&Explain_pretty_print,
|
||||
true, NULL, NULL
|
||||
},
|
||||
{
|
||||
{"stats_start_collector", PGC_POSTMASTER, STATS_COLLECTOR,
|
||||
gettext_noop("Starts the server statistics-collection subprocess."),
|
||||
NULL
|
||||
},
|
||||
&pgstat_collect_startcollector,
|
||||
true, NULL, NULL
|
||||
},
|
||||
{
|
||||
{"stats_reset_on_server_start", PGC_POSTMASTER, STATS_COLLECTOR,
|
||||
gettext_noop("Zeroes collected statistics on server restart."),
|
||||
NULL
|
||||
},
|
||||
&pgstat_collect_resetonpmstart,
|
||||
false, NULL, NULL
|
||||
},
|
||||
{
|
||||
{"stats_row_level", PGC_SUSET, STATS_COLLECTOR,
|
||||
gettext_noop("Collects row-level statistics on database activity."),
|
||||
NULL
|
||||
},
|
||||
&pgstat_collect_tuplelevel,
|
||||
true, NULL, NULL
|
||||
},
|
||||
{
|
||||
{"stats_block_level", PGC_SUSET, STATS_COLLECTOR,
|
||||
gettext_noop("Collects block-level statistics on database activity."),
|
||||
NULL
|
||||
},
|
||||
&pgstat_collect_blocklevel,
|
||||
false, NULL, NULL
|
||||
},
|
||||
|
||||
{
|
||||
{"stats_command_string", PGC_SUSET, STATS_COLLECTOR,
|
||||
{"track_activities", PGC_SUSET, STATS_COLLECTOR,
|
||||
gettext_noop("Collects information about executing commands."),
|
||||
gettext_noop("Enables the collection of information on the currently "
|
||||
"executing command of each session, along with the time "
|
||||
"at which that command began execution.")
|
||||
"executing command of each session, along with "
|
||||
"the time at which that command began execution.")
|
||||
},
|
||||
&pgstat_collect_querystring,
|
||||
&pgstat_track_activities,
|
||||
true, NULL, NULL
|
||||
},
|
||||
{
|
||||
{"track_counts", PGC_SUSET, STATS_COLLECTOR,
|
||||
gettext_noop("Collects statistics on database activity."),
|
||||
NULL
|
||||
},
|
||||
&pgstat_track_counts,
|
||||
true, NULL, NULL
|
||||
},
|
||||
|
||||
@ -1562,9 +1538,9 @@ static struct config_int ConfigureNamesInt[] =
|
||||
|
||||
{
|
||||
{"log_min_duration_statement", PGC_SUSET, LOGGING_WHEN,
|
||||
gettext_noop("Sets the minimum execution time above which statements will "
|
||||
"be logged."),
|
||||
gettext_noop("Zero prints all queries. The default is -1 (turning this feature off)."),
|
||||
gettext_noop("Sets the minimum execution time above which "
|
||||
"statements will be logged."),
|
||||
gettext_noop("Zero prints all queries. -1 turns this feature off."),
|
||||
GUC_UNIT_MS
|
||||
},
|
||||
&log_min_duration_statement,
|
||||
@ -1572,13 +1548,13 @@ static struct config_int ConfigureNamesInt[] =
|
||||
},
|
||||
|
||||
{
|
||||
{"log_autovacuum", PGC_SIGHUP, LOGGING_WHAT,
|
||||
gettext_noop("Sets the minimum execution time above which autovacuum actions "
|
||||
"will be logged."),
|
||||
gettext_noop("Zero prints all actions. The default is -1 (disabling autovacuum logging)."),
|
||||
{"log_autovacuum_min_duration", PGC_SIGHUP, LOGGING_WHAT,
|
||||
gettext_noop("Sets the minimum execution time above which "
|
||||
"autovacuum actions will be logged."),
|
||||
gettext_noop("Zero prints all actions. -1 turns autovacuum logging off."),
|
||||
GUC_UNIT_MS
|
||||
},
|
||||
&Log_autovacuum,
|
||||
&Log_autovacuum_min_duration,
|
||||
-1, -1, INT_MAX / 1000, NULL, NULL
|
||||
},
|
||||
|
||||
|
||||
@ -358,15 +358,10 @@
|
||||
|
||||
# - Query/Index Statistics Collector -
|
||||
|
||||
#stats_command_string = on
|
||||
#track_activities = on
|
||||
#track_counts = on
|
||||
#update_process_title = on
|
||||
|
||||
#stats_start_collector = on # needed for block or row stats
|
||||
# (change requires restart)
|
||||
#stats_block_level = off
|
||||
#stats_row_level = on
|
||||
#stats_reset_on_server_start = off # (change requires restart)
|
||||
|
||||
|
||||
# - Statistics Monitoring -
|
||||
|
||||
@ -381,13 +376,13 @@
|
||||
#---------------------------------------------------------------------------
|
||||
|
||||
#autovacuum = on # enable autovacuum subprocess?
|
||||
# 'on' requires stats_start_collector
|
||||
# and stats_row_level to also be on
|
||||
#autovacuum_max_workers = 3 # max # of autovacuum subprocesses
|
||||
#autovacuum_naptime = 1min # time between autovacuum runs
|
||||
#log_autovacuum = -1 # -1 is disabled, 0 logs all actions
|
||||
# 'on' requires track_counts
|
||||
# to also be on
|
||||
#log_autovacuum_min_duration = -1 # -1 disables, 0 logs all actions
|
||||
# and their durations, > 0 logs only
|
||||
# actions running at least N msec.
|
||||
#autovacuum_max_workers = 3 # max # of autovacuum subprocesses
|
||||
#autovacuum_naptime = 1min # time between autovacuum runs
|
||||
#autovacuum_vacuum_threshold = 50 # min # of tuple updates before
|
||||
# vacuum
|
||||
#autovacuum_analyze_threshold = 50 # min # of tuple updates before
|
||||
|
||||
@ -5,7 +5,7 @@
|
||||
*
|
||||
* Copyright (c) 2001-2007, PostgreSQL Global Development Group
|
||||
*
|
||||
* $PostgreSQL: pgsql/src/include/pgstat.h,v 1.66 2007/09/20 17:56:32 tgl Exp $
|
||||
* $PostgreSQL: pgsql/src/include/pgstat.h,v 1.67 2007/09/24 03:12:23 tgl Exp $
|
||||
* ----------
|
||||
*/
|
||||
#ifndef PGSTAT_H
|
||||
@ -452,11 +452,8 @@ typedef struct PgBackendStatus
|
||||
* GUC parameters
|
||||
* ----------
|
||||
*/
|
||||
extern bool pgstat_collect_startcollector;
|
||||
extern bool pgstat_collect_resetonpmstart;
|
||||
extern bool pgstat_collect_tuplelevel;
|
||||
extern bool pgstat_collect_blocklevel;
|
||||
extern bool pgstat_collect_querystring;
|
||||
extern bool pgstat_track_activities;
|
||||
extern bool pgstat_track_counts;
|
||||
|
||||
/*
|
||||
* BgWriter statistics counters are updated directly by bgwriter and bufmgr
|
||||
@ -510,40 +507,40 @@ extern void pgstat_initstats(Relation rel);
|
||||
|
||||
/* nontransactional event counts are simple enough to inline */
|
||||
|
||||
#define pgstat_count_heap_scan(rel) \
|
||||
do { \
|
||||
if (pgstat_collect_tuplelevel && (rel)->pgstat_info != NULL) \
|
||||
(rel)->pgstat_info->t_counts.t_numscans++; \
|
||||
#define pgstat_count_heap_scan(rel) \
|
||||
do { \
|
||||
if (pgstat_track_counts && (rel)->pgstat_info != NULL) \
|
||||
(rel)->pgstat_info->t_counts.t_numscans++; \
|
||||
} while (0)
|
||||
#define pgstat_count_heap_getnext(rel) \
|
||||
do { \
|
||||
if (pgstat_collect_tuplelevel && (rel)->pgstat_info != NULL) \
|
||||
(rel)->pgstat_info->t_counts.t_tuples_returned++; \
|
||||
#define pgstat_count_heap_getnext(rel) \
|
||||
do { \
|
||||
if (pgstat_track_counts && (rel)->pgstat_info != NULL) \
|
||||
(rel)->pgstat_info->t_counts.t_tuples_returned++; \
|
||||
} while (0)
|
||||
#define pgstat_count_heap_fetch(rel) \
|
||||
do { \
|
||||
if (pgstat_collect_tuplelevel && (rel)->pgstat_info != NULL) \
|
||||
(rel)->pgstat_info->t_counts.t_tuples_fetched++; \
|
||||
#define pgstat_count_heap_fetch(rel) \
|
||||
do { \
|
||||
if (pgstat_track_counts && (rel)->pgstat_info != NULL) \
|
||||
(rel)->pgstat_info->t_counts.t_tuples_fetched++; \
|
||||
} while (0)
|
||||
#define pgstat_count_index_scan(rel) \
|
||||
do { \
|
||||
if (pgstat_collect_tuplelevel && (rel)->pgstat_info != NULL) \
|
||||
(rel)->pgstat_info->t_counts.t_numscans++; \
|
||||
#define pgstat_count_index_scan(rel) \
|
||||
do { \
|
||||
if (pgstat_track_counts && (rel)->pgstat_info != NULL) \
|
||||
(rel)->pgstat_info->t_counts.t_numscans++; \
|
||||
} while (0)
|
||||
#define pgstat_count_index_tuples(rel, n) \
|
||||
do { \
|
||||
if (pgstat_collect_tuplelevel && (rel)->pgstat_info != NULL) \
|
||||
(rel)->pgstat_info->t_counts.t_tuples_returned += (n); \
|
||||
#define pgstat_count_index_tuples(rel, n) \
|
||||
do { \
|
||||
if (pgstat_track_counts && (rel)->pgstat_info != NULL) \
|
||||
(rel)->pgstat_info->t_counts.t_tuples_returned += (n); \
|
||||
} while (0)
|
||||
#define pgstat_count_buffer_read(rel) \
|
||||
do { \
|
||||
if (pgstat_collect_blocklevel && (rel)->pgstat_info != NULL) \
|
||||
(rel)->pgstat_info->t_counts.t_blocks_fetched++; \
|
||||
#define pgstat_count_buffer_read(rel) \
|
||||
do { \
|
||||
if (pgstat_track_counts && (rel)->pgstat_info != NULL) \
|
||||
(rel)->pgstat_info->t_counts.t_blocks_fetched++; \
|
||||
} while (0)
|
||||
#define pgstat_count_buffer_hit(rel) \
|
||||
do { \
|
||||
if (pgstat_collect_blocklevel && (rel)->pgstat_info != NULL) \
|
||||
(rel)->pgstat_info->t_counts.t_blocks_hit++; \
|
||||
#define pgstat_count_buffer_hit(rel) \
|
||||
do { \
|
||||
if (pgstat_track_counts && (rel)->pgstat_info != NULL) \
|
||||
(rel)->pgstat_info->t_counts.t_blocks_hit++; \
|
||||
} while (0)
|
||||
|
||||
extern void pgstat_count_heap_insert(Relation rel);
|
||||
|
||||
@ -7,7 +7,7 @@
|
||||
* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
|
||||
* Portions Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* $PostgreSQL: pgsql/src/include/postmaster/autovacuum.h,v 1.11 2007/06/25 16:09:03 alvherre Exp $
|
||||
* $PostgreSQL: pgsql/src/include/postmaster/autovacuum.h,v 1.12 2007/09/24 03:12:23 tgl Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
@ -31,7 +31,7 @@ extern int autovacuum_vac_cost_limit;
|
||||
/* autovacuum launcher PID, only valid when worker is shutting down */
|
||||
extern int AutovacuumLauncherPid;
|
||||
|
||||
extern int Log_autovacuum;
|
||||
extern int Log_autovacuum_min_duration;
|
||||
|
||||
/* Status inquiry functions */
|
||||
extern bool AutoVacuumingActive(void);
|
||||
|
||||
@ -5,9 +5,9 @@
|
||||
-- populated (by create_misc) and indexed (by create_index).
|
||||
--
|
||||
-- conditio sine qua non
|
||||
SHOW stats_start_collector; -- must be on
|
||||
stats_start_collector
|
||||
-----------------------
|
||||
SHOW track_counts; -- must be on
|
||||
track_counts
|
||||
--------------
|
||||
on
|
||||
(1 row)
|
||||
|
||||
@ -56,9 +56,6 @@ begin
|
||||
extract(epoch from clock_timestamp() - start_time);
|
||||
end
|
||||
$$ language plpgsql;
|
||||
-- enable statistics
|
||||
SET stats_block_level = on;
|
||||
SET stats_row_level = on;
|
||||
-- do a seqscan
|
||||
SELECT count(*) FROM tenk2;
|
||||
count
|
||||
|
||||
@ -6,7 +6,7 @@
|
||||
--
|
||||
|
||||
-- conditio sine qua non
|
||||
SHOW stats_start_collector; -- must be on
|
||||
SHOW track_counts; -- must be on
|
||||
|
||||
-- wait to let any prior tests finish dumping out stats;
|
||||
-- else our messages might get lost due to contention
|
||||
@ -51,10 +51,6 @@ begin
|
||||
end
|
||||
$$ language plpgsql;
|
||||
|
||||
-- enable statistics
|
||||
SET stats_block_level = on;
|
||||
SET stats_row_level = on;
|
||||
|
||||
-- do a seqscan
|
||||
SELECT count(*) FROM tenk2;
|
||||
-- do an indexscan
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user