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Tweak the behavior of log_duration as proposed by Guillaume Smet: rather
than being equivalent to setting log_min_duration_statement to zero, this option now forces logging of all query durations, but doesn't force logging of query text. Also, add duration logging coverage for fastpath function calls.
This commit is contained in:
Tom Lane
parent
0b33c56297
commit
b59d31c215
@ -1,4 +1,4 @@
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<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.84 2006/09/07 22:51:59 tgl Exp $ -->
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<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.85 2006/09/08 15:55:52 tgl Exp $ -->
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<chapter Id="runtime-config">
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<title>Server Configuration</title>
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@ -2718,23 +2718,22 @@ SELECT * FROM parent WHERE key = 2400;
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Only superusers can change this setting.
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</para>
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<para>
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For clients using extended query protocol, durations of the Parse,
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Bind, and Execute steps are logged independently.
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</para>
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<para>
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For clients using extended query protocol, durations of the Parse,
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Bind, and Execute steps are logged independently.
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</para>
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<note>
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<para>
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When using this option together with
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<xref linkend="guc-log-statement">,
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the text of statements that are logged because of
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<varname>log_statement</> will not be repeated in the
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duration log message.
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If you are not using <application>syslog</>, it is recommended
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that you log the PID or session ID using
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<xref linkend="guc-log-line-prefix">
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so that you can link the statement message to the later
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duration message using the process ID or session ID.
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The difference between setting this option and setting
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<xref linkend="guc-log-min-duration-statement"> to zero is that
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exceeding <varname>log_min_duration_statement</> forces the text of
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the query to be logged, but this option doesn't. Thus, if
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<varname>log_duration</> is <literal>on</> and
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<varname>log_min_duration_statement</> has a positive value, all
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durations are logged but the query text is included only for
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statements exceeding the threshold. This behavior can be useful for
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gathering statistics in high-load installations.
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</para>
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</note>
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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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* $PostgreSQL: pgsql/src/backend/tcop/fastpath.c,v 1.91 2006/07/14 14:52:23 momjian Exp $
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* $PostgreSQL: pgsql/src/backend/tcop/fastpath.c,v 1.92 2006/09/08 15:55:53 tgl Exp $
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*
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* NOTES
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* This cruft is the server side of PQfn.
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@ -274,6 +274,8 @@ HandleFunctionRequest(StringInfo msgBuf)
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struct fp_info my_fp;
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struct fp_info *fip;
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bool callit;
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bool was_logged = false;
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char msec_str[32];
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/*
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* Read message contents if not already done.
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@ -314,10 +316,14 @@ HandleFunctionRequest(StringInfo msgBuf)
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fid = (Oid) pq_getmsgint(msgBuf, 4); /* function oid */
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/* Log as soon as we have the function OID */
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if (log_statement == LOGSTMT_ALL)
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{
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ereport(LOG,
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(errmsg("fastpath function call: function OID %u",
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fid)));
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was_logged = true;
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}
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/*
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* There used to be a lame attempt at caching lookup info here. Now we
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@ -387,6 +393,22 @@ HandleFunctionRequest(StringInfo msgBuf)
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SendFunctionResult(retval, fcinfo.isnull, fip->rettype, rformat);
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/*
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* Emit duration logging if appropriate.
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*/
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switch (check_log_duration(msec_str, was_logged))
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{
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case 1:
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ereport(LOG,
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(errmsg("duration: %s ms", msec_str)));
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break;
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case 2:
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ereport(LOG,
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(errmsg("duration: %s ms fastpath function call: function OID %u",
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msec_str, fid)));
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break;
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}
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return 0;
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}
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@ -8,7 +8,7 @@
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*
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/tcop/postgres.c,v 1.507 2006/09/07 22:52:01 tgl Exp $
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* $PostgreSQL: pgsql/src/backend/tcop/postgres.c,v 1.508 2006/09/08 15:55:53 tgl 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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@ -159,7 +159,6 @@ static int ReadCommand(StringInfo inBuf);
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static List *pg_rewrite_queries(List *querytree_list);
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static bool check_log_statement_raw(List *raw_parsetree_list);
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static bool check_log_statement_cooked(List *parsetree_list);
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static bool check_log_duration(char *msec_str);
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static int errdetail_execute(List *raw_parsetree_list);
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static int errdetail_params(ParamListInfo params);
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static void start_xact_command(void);
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@ -995,16 +994,18 @@ exec_simple_query(const char *query_string)
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/*
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* Emit duration logging if appropriate.
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*/
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if (check_log_duration(msec_str))
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switch (check_log_duration(msec_str, was_logged))
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{
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if (was_logged)
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case 1:
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ereport(LOG,
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(errmsg("duration: %s ms", msec_str)));
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else
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break;
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case 2:
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ereport(LOG,
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(errmsg("duration: %s ms statement: %s",
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msec_str, query_string),
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errdetail_execute(parsetree_list)));
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break;
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}
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if (save_log_statement_stats)
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@ -1247,12 +1248,20 @@ exec_parse_message(const char *query_string, /* string to execute */
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/*
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* Emit duration logging if appropriate.
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*/
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if (check_log_duration(msec_str))
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ereport(LOG,
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(errmsg("duration: %s ms parse %s: %s",
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msec_str,
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*stmt_name ? stmt_name : "<unnamed>",
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query_string)));
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switch (check_log_duration(msec_str, false))
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{
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case 1:
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ereport(LOG,
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(errmsg("duration: %s ms", msec_str)));
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break;
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case 2:
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ereport(LOG,
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(errmsg("duration: %s ms parse %s: %s",
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msec_str,
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*stmt_name ? stmt_name : "<unnamed>",
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query_string)));
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break;
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}
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if (save_log_statement_stats)
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ShowUsage("PARSE MESSAGE STATISTICS");
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@ -1593,14 +1602,22 @@ exec_bind_message(StringInfo input_message)
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/*
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* Emit duration logging if appropriate.
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*/
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if (check_log_duration(msec_str))
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ereport(LOG,
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(errmsg("duration: %s ms bind %s to %s: %s",
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msec_str,
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*portal_name ? portal_name : "<unnamed>",
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*stmt_name ? stmt_name : "<unnamed>",
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pstmt->query_string ? pstmt->query_string : "<source not stored>"),
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errdetail_params(params)));
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switch (check_log_duration(msec_str, false))
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{
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case 1:
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ereport(LOG,
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(errmsg("duration: %s ms", msec_str)));
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break;
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case 2:
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ereport(LOG,
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(errmsg("duration: %s ms bind %s to %s: %s",
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msec_str,
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*portal_name ? portal_name : "<unnamed>",
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*stmt_name ? stmt_name : "<unnamed>",
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pstmt->query_string ? pstmt->query_string : "<source not stored>"),
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errdetail_params(params)));
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break;
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}
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if (save_log_statement_stats)
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ShowUsage("BIND MESSAGE STATISTICS");
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@ -1794,12 +1811,13 @@ exec_execute_message(const char *portal_name, long max_rows)
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/*
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* Emit duration logging if appropriate.
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*/
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if (check_log_duration(msec_str))
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switch (check_log_duration(msec_str, was_logged))
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{
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if (was_logged)
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case 1:
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ereport(LOG,
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(errmsg("duration: %s ms", msec_str)));
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else
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break;
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case 2:
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ereport(LOG,
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(errmsg("duration: %s ms %s %s%s%s%s%s",
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msec_str,
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@ -1812,6 +1830,7 @@ exec_execute_message(const char *portal_name, long max_rows)
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sourceText ? ": " : "",
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sourceText ? sourceText : ""),
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errdetail_params(portalParams)));
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break;
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}
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if (save_log_statement_stats)
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@ -1878,17 +1897,26 @@ check_log_statement_cooked(List *parsetree_list)
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* check_log_duration
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* Determine whether current command's duration should be logged
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*
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* Returns:
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* 0 if no logging is needed
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* 1 if just the duration should be logged
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* 2 if duration and query details should be logged
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*
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* If logging is needed, the duration in msec is formatted into msec_str[],
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* which must be a 32-byte buffer.
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*
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* was_logged should be TRUE if caller already logged query details (this
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* essentially prevents 2 from being returned).
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*/
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static bool
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check_log_duration(char *msec_str)
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int
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check_log_duration(char *msec_str, bool was_logged)
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{
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if (log_duration || log_min_duration_statement >= 0)
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{
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long secs;
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int usecs;
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int msecs;
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bool exceeded;
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TimestampDifference(GetCurrentStatementStartTimestamp(),
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GetCurrentTimestamp(),
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@ -1896,24 +1924,28 @@ check_log_duration(char *msec_str)
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msecs = usecs / 1000;
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/*
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* The odd-looking test for log_min_duration_statement being
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* This odd-looking test for log_min_duration_statement being
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* exceeded is designed to avoid integer overflow with very
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* long durations: don't compute secs * 1000 until we've
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* verified it will fit in int.
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*/
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if (log_duration ||
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log_min_duration_statement == 0 ||
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(log_min_duration_statement > 0 &&
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(secs > log_min_duration_statement / 1000 ||
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secs * 1000 + msecs >= log_min_duration_statement)))
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exceeded = (log_min_duration_statement == 0 ||
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(log_min_duration_statement > 0 &&
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(secs > log_min_duration_statement / 1000 ||
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secs * 1000 + msecs >= log_min_duration_statement)));
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if (exceeded || log_duration)
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{
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snprintf(msec_str, 32, "%ld.%03d",
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secs * 1000 + msecs, usecs % 1000);
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return true;
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if (exceeded && !was_logged)
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return 2;
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else
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return 1;
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}
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}
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return false;
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return 0;
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}
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/*
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@ -7,7 +7,7 @@
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* Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $PostgreSQL: pgsql/src/include/tcop/tcopprot.h,v 1.82 2006/07/13 18:01:02 momjian Exp $
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* $PostgreSQL: pgsql/src/include/tcop/tcopprot.h,v 1.83 2006/09/08 15:55:53 tgl Exp $
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*
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* OLD COMMENTS
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* This file was created so that other c files could get the two
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@ -64,6 +64,7 @@ extern void client_read_ended(void);
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extern int PostgresMain(int argc, char *argv[], const char *username);
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extern void ResetUsage(void);
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extern void ShowUsage(const char *title);
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extern int check_log_duration(char *msec_str, bool was_logged);
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extern void set_debug_options(int debug_flag,
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GucContext context, GucSource source);
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extern bool set_plan_disabling_options(const char *arg,
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