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Add log_min_duration_statement.
Christopher Kings-Lynne
This commit is contained in:
Bruce Momjian
parent
8bfe93c5c8
commit
b952d61c54
@ -1,5 +1,5 @@
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<!--
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$Header: /cvsroot/pgsql/doc/src/sgml/runtime.sgml,v 1.182 2003/05/27 17:49:45 momjian Exp $
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$Header: /cvsroot/pgsql/doc/src/sgml/runtime.sgml,v 1.183 2003/06/11 18:01:13 momjian Exp $
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-->
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<Chapter Id="runtime">
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@ -1051,6 +1051,23 @@ SET ENABLE_SEQSCAN TO OFF;
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>LOG_MIN_DURATION_STATEMENT</varname> (<type>integer</type>)</term>
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<listitem>
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<para>
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Sets a minimum statement execution time (in milliseconds)
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above which a statement will be logged. All SQL statements
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that run longer than the time specified will be logged together
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with the duration, in seconds. The default is <literal>0</literal>
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(turning this feature off). For example, if you set it
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to <literal>250</literal> then all SQL statements that run longer
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than 250ms will be logged along with the duration. Enabling this
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option can be useful in tracking down unoptimized queries in
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your applications.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>LOG_MIN_ERROR_STATEMENT</varname> (<type>string</type>)</term>
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<listitem>
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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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* $Header: /cvsroot/pgsql/src/backend/tcop/postgres.c,v 1.346 2003/05/27 17:49:46 momjian Exp $
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* $Header: /cvsroot/pgsql/src/backend/tcop/postgres.c,v 1.347 2003/06/11 18:01:14 momjian Exp $
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*
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* NOTES
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* this is the "main" module of the postgres backend and
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@ -663,6 +663,7 @@ exec_simple_query(const char *query_string)
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struct timeval start_t,
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stop_t;
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bool save_log_duration = log_duration;
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int save_log_min_duration_statement = log_min_duration_statement;
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bool save_log_statement_stats = log_statement_stats;
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/*
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@ -673,11 +674,12 @@ exec_simple_query(const char *query_string)
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pgstat_report_activity(query_string);
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/*
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* We use save_log_duration so "SET log_duration = true" doesn't
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* report incorrect time because gettimeofday() wasn't called.
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* We use save_log_* so "SET log_duration = true" and
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* "SET log_min_duration_statement = true" don't report incorrect
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* time because gettimeofday() wasn't called.
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* Similarly, log_statement_stats has to be captured once.
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*/
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if (save_log_duration)
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if (save_log_duration || save_log_min_duration_statement > 0)
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gettimeofday(&start_t, NULL);
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if (save_log_statement_stats)
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@ -915,19 +917,38 @@ exec_simple_query(const char *query_string)
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QueryContext = NULL;
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/*
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* Finish up monitoring.
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* Combine processing here as we need to calculate the query
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* duration in both instances.
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*/
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if (save_log_duration)
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if (save_log_duration || save_log_min_duration_statement > 0)
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{
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long usecs;
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gettimeofday(&stop_t, NULL);
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if (stop_t.tv_usec < start_t.tv_usec)
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{
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stop_t.tv_sec--;
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stop_t.tv_usec += 1000000;
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}
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elog(LOG, "duration: %ld.%06ld sec",
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(long) (stop_t.tv_sec - start_t.tv_sec),
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(long) (stop_t.tv_usec - start_t.tv_usec));
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usecs = (long) (stop_t.tv_sec - start_t.tv_sec) * 1000000 + (long) (stop_t.tv_usec - start_t.tv_usec);
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/*
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* Output a duration_query to the log if the query has exceeded the
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* min duration.
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*/
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if (usecs >= save_log_min_duration_statement * 1000)
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elog(LOG, "duration_statement: %ld.%06ld %s",
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(long) (stop_t.tv_sec - start_t.tv_sec),
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(long) (stop_t.tv_usec - start_t.tv_usec),
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query_string);
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/*
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* If the user is requesting logging of all durations, then log
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* that as well.
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*/
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if (save_log_duration)
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elog(LOG, "duration: %ld.%06ld sec",
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(long) (stop_t.tv_sec - start_t.tv_sec),
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(long) (stop_t.tv_usec - start_t.tv_usec));
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}
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if (save_log_statement_stats)
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@ -2526,7 +2547,7 @@ PostgresMain(int argc, char *argv[], const char *username)
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if (!IsUnderPostmaster)
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{
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puts("\nPOSTGRES backend interactive interface ");
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puts("$Revision: 1.346 $ $Date: 2003/05/27 17:49:46 $\n");
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puts("$Revision: 1.347 $ $Date: 2003/06/11 18:01:14 $\n");
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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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* $Header: /cvsroot/pgsql/src/backend/utils/misc/guc.c,v 1.128 2003/06/11 05:04:51 momjian Exp $
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* $Header: /cvsroot/pgsql/src/backend/utils/misc/guc.c,v 1.129 2003/06/11 18:01:14 momjian Exp $
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*
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*--------------------------------------------------------------------
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*/
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@ -55,6 +55,8 @@
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#include "utils/pg_locale.h"
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#include "pgstat.h"
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int log_min_duration_statement = 0;
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#ifndef PG_KRB_SRVTAB
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#define PG_KRB_SRVTAB ""
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@ -735,6 +737,11 @@ static struct config_int
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0, -15, 2, NULL, NULL
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},
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{
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{"log_min_duration_statement", PGC_USERSET}, &log_min_duration_statement,
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0, 0, INT_MAX / 1000, NULL, NULL
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},
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{
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{NULL, 0}, NULL, 0, 0, 0, NULL, NULL
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}
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@ -140,6 +140,10 @@
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# debug5, debug4, debug3, debug2, debug1,
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# info, notice, warning, error, panic(off)
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#log_min_duration_statement = 0 # Log all statements whose
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# execution time exceeds the value, in
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# milliseconds. Zero disables.
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#debug_print_parse = false
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#debug_print_rewritten = false
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#debug_print_plan = false
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@ -3,7 +3,7 @@
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*
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* Copyright 2000-2002 by PostgreSQL Global Development Group
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*
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* $Header: /cvsroot/pgsql/src/bin/psql/tab-complete.c,v 1.77 2003/05/14 03:26:02 tgl Exp $
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* $Header: /cvsroot/pgsql/src/bin/psql/tab-complete.c,v 1.78 2003/06/11 18:01:14 momjian Exp $
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*/
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/*----------------------------------------------------------------------
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@ -538,6 +538,7 @@ psql_completion(char *text, int start, int end)
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"lc_time",
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"log_duration",
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"log_executor_stats",
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"log_min_duration_statement",
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"log_min_error_statement",
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"log_min_messages",
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"log_parser_stats",
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@ -7,7 +7,7 @@
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* Copyright 2000-2003 by PostgreSQL Global Development Group
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* Written by Peter Eisentraut <peter_e@gmx.net>.
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*
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* $Id: guc.h,v 1.31 2003/05/06 20:26:28 tgl Exp $
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* $Id: guc.h,v 1.32 2003/06/11 18:01:14 momjian Exp $
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*--------------------------------------------------------------------
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*/
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#ifndef GUC_H
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@ -142,4 +142,6 @@ void write_nondefault_variables(GucContext context);
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void read_nondefault_variables(void);
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#endif
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extern int log_min_duration_statement;
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#endif /* GUC_H */
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