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Add an EXPLAIN (BUFFERS) option to show buffer-usage statistics.
This patch also removes buffer-usage statistics from the track_counts output, since this (or the global server statistics) is deemed to be a better interface to this information. Itagaki Takahiro, reviewed by Euler Taveira de Oliveira.
This commit is contained in:
Robert Haas
parent
6f1bf75d50
commit
cddca5ec13
@ -6,7 +6,7 @@
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* Copyright (c) 2008-2009, PostgreSQL Global Development Group
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/contrib/auto_explain/auto_explain.c,v 1.9 2009/12/12 00:35:33 rhaas Exp $
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* $PostgreSQL: pgsql/contrib/auto_explain/auto_explain.c,v 1.10 2009/12/15 04:57:46 rhaas Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -22,6 +22,7 @@ PG_MODULE_MAGIC;
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static int auto_explain_log_min_duration = -1; /* msec or -1 */
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static bool auto_explain_log_analyze = false;
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static bool auto_explain_log_verbose = false;
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static bool auto_explain_log_buffers = false;
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static int auto_explain_log_format = EXPLAIN_FORMAT_TEXT;
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static bool auto_explain_log_nested_statements = false;
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@ -93,6 +94,16 @@ _PG_init(void)
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NULL,
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NULL);
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DefineCustomBoolVariable("auto_explain.log_buffers",
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"Log buffers usage.",
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NULL,
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&auto_explain_log_buffers,
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false,
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PGC_SUSET,
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0,
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NULL,
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NULL);
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DefineCustomEnumVariable("auto_explain.log_format",
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"EXPLAIN format to be used for plan logging.",
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NULL,
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@ -147,7 +158,11 @@ explain_ExecutorStart(QueryDesc *queryDesc, int eflags)
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{
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/* Enable per-node instrumentation iff log_analyze is required. */
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if (auto_explain_log_analyze && (eflags & EXEC_FLAG_EXPLAIN_ONLY) == 0)
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queryDesc->doInstrument = true;
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{
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queryDesc->instrument_options |= INSTRUMENT_TIMER;
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if (auto_explain_log_buffers)
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queryDesc->instrument_options |= INSTRUMENT_BUFFERS;
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}
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}
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if (prev_ExecutorStart)
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@ -167,7 +182,7 @@ explain_ExecutorStart(QueryDesc *queryDesc, int eflags)
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MemoryContext oldcxt;
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oldcxt = MemoryContextSwitchTo(queryDesc->estate->es_query_cxt);
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queryDesc->totaltime = InstrAlloc(1);
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queryDesc->totaltime = InstrAlloc(1, INSTRUMENT_ALL);
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MemoryContextSwitchTo(oldcxt);
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}
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}
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@ -219,8 +234,9 @@ explain_ExecutorEnd(QueryDesc *queryDesc)
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ExplainState es;
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ExplainInitState(&es);
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es.analyze = (queryDesc->doInstrument && auto_explain_log_analyze);
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es.analyze = (queryDesc->instrument_options && auto_explain_log_analyze);
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es.verbose = auto_explain_log_verbose;
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es.buffers = (es.analyze && auto_explain_log_buffers);
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es.format = auto_explain_log_format;
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ExplainBeginOutput(&es);
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@ -14,7 +14,7 @@
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* Copyright (c) 2008-2009, PostgreSQL Global Development Group
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/contrib/pg_stat_statements/pg_stat_statements.c,v 1.7 2009/12/01 02:31:11 momjian Exp $
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* $PostgreSQL: pgsql/contrib/pg_stat_statements/pg_stat_statements.c,v 1.8 2009/12/15 04:57:46 rhaas Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -495,7 +495,7 @@ pgss_ExecutorStart(QueryDesc *queryDesc, int eflags)
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MemoryContext oldcxt;
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oldcxt = MemoryContextSwitchTo(queryDesc->estate->es_query_cxt);
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queryDesc->totaltime = InstrAlloc(1);
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queryDesc->totaltime = InstrAlloc(1, INSTRUMENT_ALL);
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MemoryContextSwitchTo(oldcxt);
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}
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}
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@ -1,4 +1,4 @@
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<!-- $PostgreSQL: pgsql/doc/src/sgml/auto-explain.sgml,v 1.5 2009/12/11 01:33:35 adunstan Exp $ -->
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<!-- $PostgreSQL: pgsql/doc/src/sgml/auto-explain.sgml,v 1.6 2009/12/15 04:57:47 rhaas Exp $ -->
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<sect1 id="auto-explain">
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<title>auto_explain</title>
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@ -102,6 +102,25 @@ LOAD 'auto_explain';
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<varname>auto_explain.log_buffers</varname> (<type>boolean</type>)
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</term>
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<indexterm>
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<primary><varname>auto_explain.log_buffers</> configuration parameter</primary>
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</indexterm>
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<listitem>
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<para>
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<varname>auto_explain.log_buffers</varname> causes <command>EXPLAIN
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(ANALYZE, BUFFERS)</> output, rather than just <command>EXPLAIN</>
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output, to be printed when an execution plan is logged. This parameter is
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off by default. Only superusers can change this setting. This
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parameter has no effect unless <varname>auto_explain.log_analyze</>
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parameter is set.
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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>
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<varname>auto_explain.log_format</varname> (<type>enum</type>)
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@ -1,5 +1,5 @@
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<!--
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$PostgreSQL: pgsql/doc/src/sgml/ref/explain.sgml,v 1.47 2009/12/11 01:33:35 adunstan Exp $
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$PostgreSQL: pgsql/doc/src/sgml/ref/explain.sgml,v 1.48 2009/12/15 04:57:47 rhaas Exp $
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PostgreSQL documentation
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-->
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@ -31,7 +31,7 @@ PostgreSQL documentation
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<refsynopsisdiv>
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<synopsis>
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EXPLAIN [ ( { ANALYZE <replaceable class="parameter">boolean</replaceable> | VERBOSE <replaceable class="parameter">boolean</replaceable> | COSTS <replaceable class="parameter">boolean</replaceable> | FORMAT { TEXT | XML | JSON | YAML } } [, ...] ) ] <replaceable class="parameter">statement</replaceable>
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EXPLAIN [ ( { ANALYZE <replaceable class="parameter">boolean</replaceable> | VERBOSE <replaceable class="parameter">boolean</replaceable> | COSTS <replaceable class="parameter">boolean</replaceable> | BUFFERS <replaceable class="parameter">boolean</replaceable> | FORMAT { TEXT | XML | JSON | YAML } } [, ...] ) ] <replaceable class="parameter">statement</replaceable>
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EXPLAIN [ ANALYZE ] [ VERBOSE ] <replaceable class="parameter">statement</replaceable>
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</synopsis>
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</refsynopsisdiv>
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@ -139,6 +139,24 @@ ROLLBACK;
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><literal>BUFFERS</literal></term>
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<listitem>
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<para>
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Include information on buffer usage. Specifically, include the number of
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shared blocks hits, reads, and writes, the number of local blocks hits,
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reads, and writes, and the number of temp blocks reads and writes.
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Shared blocks, local blocks, and temp blocks contain tables and indexes,
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temporary tables and temporary indexes, and disk blocks used in sort and
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materialized plans, respectively. The number of blocks shown for an
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upper-level node includes those used by all its child nodes. In text
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format, only non-zero values are printed. This parameter may only be
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used with <literal>ANALYZE</literal> parameter. It defaults to
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<literal>FALSE</literal>.
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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><literal>FORMAT</literal></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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* $PostgreSQL: pgsql/src/backend/commands/copy.c,v 1.318 2009/11/20 20:38:10 tgl Exp $
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* $PostgreSQL: pgsql/src/backend/commands/copy.c,v 1.319 2009/12/15 04:57:47 rhaas Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -1094,7 +1094,7 @@ DoCopy(const CopyStmt *stmt, const char *queryString)
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cstate->queryDesc = CreateQueryDesc(plan, queryString,
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GetActiveSnapshot(),
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InvalidSnapshot,
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dest, NULL, false);
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dest, NULL, 0);
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/*
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* Call ExecutorStart to prepare the plan for execution.
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@ -7,7 +7,7 @@
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* Portions Copyright (c) 1994-5, Regents of the University of California
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/commands/explain.c,v 1.195 2009/12/12 00:35:33 rhaas Exp $
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* $PostgreSQL: pgsql/src/backend/commands/explain.c,v 1.196 2009/12/15 04:57:47 rhaas Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -125,6 +125,8 @@ ExplainQuery(ExplainStmt *stmt, const char *queryString,
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es.verbose = defGetBoolean(opt);
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else if (strcmp(opt->defname, "costs") == 0)
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es.costs = defGetBoolean(opt);
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else if (strcmp(opt->defname, "buffers") == 0)
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es.buffers = defGetBoolean(opt);
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else if (strcmp(opt->defname, "format") == 0)
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{
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char *p = defGetString(opt);
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@ -150,6 +152,11 @@ ExplainQuery(ExplainStmt *stmt, const char *queryString,
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opt->defname)));
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}
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if (es.buffers && !es.analyze)
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ereport(ERROR,
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(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
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errmsg("EXPLAIN option BUFFERS requires ANALYZE")));
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/*
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* Run parse analysis and rewrite. Note this also acquires sufficient
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* locks on the source table(s).
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@ -339,6 +346,12 @@ ExplainOnePlan(PlannedStmt *plannedstmt, ExplainState *es,
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instr_time starttime;
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double totaltime = 0;
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int eflags;
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int instrument_option = 0;
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if (es->analyze)
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instrument_option |= INSTRUMENT_TIMER;
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if (es->buffers)
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instrument_option |= INSTRUMENT_BUFFERS;
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/*
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* Use a snapshot with an updated command ID to ensure this query sees
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@ -349,7 +362,7 @@ ExplainOnePlan(PlannedStmt *plannedstmt, ExplainState *es,
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/* Create a QueryDesc requesting no output */
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queryDesc = CreateQueryDesc(plannedstmt, queryString,
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GetActiveSnapshot(), InvalidSnapshot,
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None_Receiver, params, es->analyze);
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None_Receiver, params, instrument_option);
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INSTR_TIME_SET_CURRENT(starttime);
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@ -1042,6 +1055,84 @@ ExplainNode(Plan *plan, PlanState *planstate,
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break;
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}
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/* Show buffer usage */
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if (es->buffers)
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{
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const BufferUsage *usage = &planstate->instrument->bufusage;
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if (es->format == EXPLAIN_FORMAT_TEXT)
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{
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bool has_shared = (usage->shared_blks_hit > 0 ||
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usage->shared_blks_read > 0 ||
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usage->shared_blks_written);
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bool has_local = (usage->local_blks_hit > 0 ||
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usage->local_blks_read > 0 ||
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usage->local_blks_written);
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bool has_temp = (usage->temp_blks_read > 0 ||
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usage->temp_blks_written);
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/* Show only positive counter values. */
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if (has_shared || has_local || has_temp)
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{
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appendStringInfoSpaces(es->str, es->indent * 2);
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appendStringInfoString(es->str, "Buffers:");
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if (has_shared)
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{
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appendStringInfoString(es->str, " shared");
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if (usage->shared_blks_hit > 0)
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appendStringInfo(es->str, " hit=%ld",
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usage->shared_blks_hit);
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if (usage->shared_blks_read > 0)
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appendStringInfo(es->str, " read=%ld",
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usage->shared_blks_read);
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if (usage->shared_blks_written > 0)
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appendStringInfo(es->str, " written=%ld",
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usage->shared_blks_written);
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if (has_local || has_temp)
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appendStringInfoChar(es->str, ',');
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}
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if (has_local)
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{
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appendStringInfoString(es->str, " local");
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if (usage->local_blks_hit > 0)
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appendStringInfo(es->str, " hit=%ld",
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usage->local_blks_hit);
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if (usage->local_blks_read > 0)
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appendStringInfo(es->str, " read=%ld",
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usage->local_blks_read);
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if (usage->local_blks_written > 0)
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appendStringInfo(es->str, " written=%ld",
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usage->local_blks_written);
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if (has_temp)
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appendStringInfoChar(es->str, ',');
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}
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if (has_temp)
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{
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appendStringInfoString(es->str, " temp");
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if (usage->temp_blks_read > 0)
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appendStringInfo(es->str, " read=%ld",
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usage->temp_blks_read);
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if (usage->temp_blks_written > 0)
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appendStringInfo(es->str, " written=%ld",
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usage->temp_blks_written);
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}
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appendStringInfoChar(es->str, '\n');
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}
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}
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else
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{
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ExplainPropertyLong("Shared Hit Blocks", usage->shared_blks_hit, es);
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ExplainPropertyLong("Shared Read Blocks", usage->shared_blks_read, es);
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ExplainPropertyLong("Shared Written Blocks", usage->shared_blks_written, es);
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ExplainPropertyLong("Local Hit Blocks", usage->local_blks_hit, es);
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ExplainPropertyLong("Local Read Blocks", usage->local_blks_read, es);
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ExplainPropertyLong("Local Written Blocks", usage->local_blks_written, es);
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ExplainPropertyLong("Temp Read Blocks", usage->temp_blks_read, es);
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ExplainPropertyLong("Temp Written Blocks", usage->temp_blks_written, es);
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}
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}
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/* Get ready to display the child plans */
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haschildren = plan->initPlan ||
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outerPlan(plan) ||
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@ -8,7 +8,7 @@
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*
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/commands/tablecmds.c,v 1.309 2009/12/11 03:34:55 itagaki Exp $
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* $PostgreSQL: pgsql/src/backend/commands/tablecmds.c,v 1.310 2009/12/15 04:57:47 rhaas Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -936,7 +936,7 @@ ExecuteTruncate(TruncateStmt *stmt)
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rel,
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0, /* dummy rangetable index */
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CMD_DELETE, /* don't need any index info */
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false);
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0);
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resultRelInfo++;
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}
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estate->es_result_relations = resultRelInfos;
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@ -26,7 +26,7 @@
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*
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/executor/execMain.c,v 1.337 2009/12/11 18:14:43 tgl Exp $
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* $PostgreSQL: pgsql/src/backend/executor/execMain.c,v 1.338 2009/12/15 04:57:47 rhaas Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -180,7 +180,7 @@ standard_ExecutorStart(QueryDesc *queryDesc, int eflags)
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*/
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estate->es_snapshot = RegisterSnapshot(queryDesc->snapshot);
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estate->es_crosscheck_snapshot = RegisterSnapshot(queryDesc->crosscheck_snapshot);
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estate->es_instrument = queryDesc->doInstrument;
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estate->es_instrument = queryDesc->instrument_options;
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/*
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* Initialize the plan state tree
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@ -859,7 +859,7 @@ InitResultRelInfo(ResultRelInfo *resultRelInfo,
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Relation resultRelationDesc,
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Index resultRelationIndex,
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CmdType operation,
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bool doInstrument)
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int instrument_options)
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{
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/*
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* Check valid relkind ... parser and/or planner should have noticed this
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@ -914,10 +914,8 @@ InitResultRelInfo(ResultRelInfo *resultRelInfo,
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palloc0(n * sizeof(FmgrInfo));
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resultRelInfo->ri_TrigWhenExprs = (List **)
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palloc0(n * sizeof(List *));
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if (doInstrument)
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resultRelInfo->ri_TrigInstrument = InstrAlloc(n);
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else
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resultRelInfo->ri_TrigInstrument = NULL;
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if (instrument_options)
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resultRelInfo->ri_TrigInstrument = InstrAlloc(n, instrument_options);
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}
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else
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{
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@ -12,7 +12,7 @@
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*
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/executor/execProcnode.c,v 1.68 2009/10/12 18:10:41 tgl Exp $
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* $PostgreSQL: pgsql/src/backend/executor/execProcnode.c,v 1.69 2009/12/15 04:57:47 rhaas Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -321,7 +321,7 @@ ExecInitNode(Plan *node, EState *estate, int eflags)
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/* Set up instrumentation for this node if requested */
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if (estate->es_instrument)
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result->instrument = InstrAlloc(1);
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result->instrument = InstrAlloc(1, estate->es_instrument);
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return result;
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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/executor/functions.c,v 1.137 2009/12/14 02:15:51 tgl Exp $
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* $PostgreSQL: pgsql/src/backend/executor/functions.c,v 1.138 2009/12/15 04:57:47 rhaas Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -414,7 +414,7 @@ postquel_start(execution_state *es, SQLFunctionCachePtr fcache)
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fcache->src,
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snapshot, InvalidSnapshot,
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dest,
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fcache->paramLI, false);
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fcache->paramLI, 0);
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else
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es->qd = CreateUtilityQueryDesc(es->stmt,
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fcache->src,
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@ -7,7 +7,7 @@
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* Copyright (c) 2001-2009, PostgreSQL Global Development Group
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*
|
||||
* IDENTIFICATION
|
||||
* $PostgreSQL: pgsql/src/backend/executor/instrument.c,v 1.22 2009/01/01 17:23:41 momjian Exp $
|
||||
* $PostgreSQL: pgsql/src/backend/executor/instrument.c,v 1.23 2009/12/15 04:57:47 rhaas Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
@ -17,14 +17,28 @@
|
||||
|
||||
#include "executor/instrument.h"
|
||||
|
||||
BufferUsage pgBufferUsage;
|
||||
|
||||
static void BufferUsageAccumDiff(BufferUsage *dst,
|
||||
const BufferUsage *add, const BufferUsage *sub);
|
||||
|
||||
/* Allocate new instrumentation structure(s) */
|
||||
Instrumentation *
|
||||
InstrAlloc(int n)
|
||||
InstrAlloc(int n, int instrument_options)
|
||||
{
|
||||
Instrumentation *instr = palloc0(n * sizeof(Instrumentation));
|
||||
Instrumentation *instr;
|
||||
|
||||
/* we don't need to do any initialization except zero 'em */
|
||||
/* timer is always required for now */
|
||||
Assert(instrument_options & INSTRUMENT_TIMER);
|
||||
|
||||
instr = palloc0(n * sizeof(Instrumentation));
|
||||
if (instrument_options & INSTRUMENT_BUFFERS)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = 0; i < n; i++)
|
||||
instr[i].needs_bufusage = true;
|
||||
}
|
||||
|
||||
return instr;
|
||||
}
|
||||
@ -37,6 +51,10 @@ InstrStartNode(Instrumentation *instr)
|
||||
INSTR_TIME_SET_CURRENT(instr->starttime);
|
||||
else
|
||||
elog(DEBUG2, "InstrStartNode called twice in a row");
|
||||
|
||||
/* initialize buffer usage per plan node */
|
||||
if (instr->needs_bufusage)
|
||||
instr->bufusage_start = pgBufferUsage;
|
||||
}
|
||||
|
||||
/* Exit from a plan node */
|
||||
@ -59,6 +77,11 @@ InstrStopNode(Instrumentation *instr, double nTuples)
|
||||
|
||||
INSTR_TIME_SET_ZERO(instr->starttime);
|
||||
|
||||
/* Adds delta of buffer usage to node's count. */
|
||||
if (instr->needs_bufusage)
|
||||
BufferUsageAccumDiff(&instr->bufusage,
|
||||
&pgBufferUsage, &instr->bufusage_start);
|
||||
|
||||
/* Is this the first tuple of this cycle? */
|
||||
if (!instr->running)
|
||||
{
|
||||
@ -95,3 +118,19 @@ InstrEndLoop(Instrumentation *instr)
|
||||
instr->firsttuple = 0;
|
||||
instr->tuplecount = 0;
|
||||
}
|
||||
|
||||
static void
|
||||
BufferUsageAccumDiff(BufferUsage *dst,
|
||||
const BufferUsage *add,
|
||||
const BufferUsage *sub)
|
||||
{
|
||||
/* dst += add - sub */
|
||||
dst->shared_blks_hit += add->shared_blks_hit - sub->shared_blks_hit;
|
||||
dst->shared_blks_read += add->shared_blks_read - sub->shared_blks_read;
|
||||
dst->shared_blks_written += add->shared_blks_written - sub->shared_blks_written;
|
||||
dst->local_blks_hit += add->local_blks_hit - sub->local_blks_hit;
|
||||
dst->local_blks_read += add->local_blks_read - sub->local_blks_read;
|
||||
dst->local_blks_written += add->local_blks_written - sub->local_blks_written;
|
||||
dst->temp_blks_read += add->temp_blks_read - sub->temp_blks_read;
|
||||
dst->temp_blks_written += add->temp_blks_written - sub->temp_blks_written;
|
||||
}
|
||||
|
||||
@ -8,7 +8,7 @@
|
||||
*
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $PostgreSQL: pgsql/src/backend/executor/spi.c,v 1.211 2009/11/04 22:26:06 tgl Exp $
|
||||
* $PostgreSQL: pgsql/src/backend/executor/spi.c,v 1.212 2009/12/15 04:57:47 rhaas Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
@ -1908,7 +1908,7 @@ _SPI_execute_plan(SPIPlanPtr plan, ParamListInfo paramLI,
|
||||
plansource->query_string,
|
||||
snap, crosscheck_snapshot,
|
||||
dest,
|
||||
paramLI, false);
|
||||
paramLI, 0);
|
||||
res = _SPI_pquery(qdesc, fire_triggers,
|
||||
canSetTag ? tcount : 0);
|
||||
FreeQueryDesc(qdesc);
|
||||
|
||||
@ -8,7 +8,7 @@
|
||||
*
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $PostgreSQL: pgsql/src/backend/storage/buffer/buf_init.c,v 1.82 2009/01/01 17:23:47 momjian Exp $
|
||||
* $PostgreSQL: pgsql/src/backend/storage/buffer/buf_init.c,v 1.83 2009/12/15 04:57:47 rhaas Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
@ -22,16 +22,6 @@ BufferDesc *BufferDescriptors;
|
||||
char *BufferBlocks;
|
||||
int32 *PrivateRefCount;
|
||||
|
||||
/* statistics counters */
|
||||
long int ReadBufferCount;
|
||||
long int ReadLocalBufferCount;
|
||||
long int BufferHitCount;
|
||||
long int LocalBufferHitCount;
|
||||
long int BufferFlushCount;
|
||||
long int LocalBufferFlushCount;
|
||||
long int BufFileReadCount;
|
||||
long int BufFileWriteCount;
|
||||
|
||||
|
||||
/*
|
||||
* Data Structures:
|
||||
|
||||
@ -8,7 +8,7 @@
|
||||
*
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $PostgreSQL: pgsql/src/backend/storage/buffer/bufmgr.c,v 1.252 2009/06/11 14:49:01 momjian Exp $
|
||||
* $PostgreSQL: pgsql/src/backend/storage/buffer/bufmgr.c,v 1.253 2009/12/15 04:57:47 rhaas Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
@ -34,6 +34,7 @@
|
||||
#include <unistd.h>
|
||||
|
||||
#include "catalog/catalog.h"
|
||||
#include "executor/instrument.h"
|
||||
#include "miscadmin.h"
|
||||
#include "pg_trace.h"
|
||||
#include "pgstat.h"
|
||||
@ -300,22 +301,23 @@ ReadBuffer_common(SMgrRelation smgr, bool isLocalBuf, ForkNumber forkNum,
|
||||
|
||||
if (isLocalBuf)
|
||||
{
|
||||
ReadLocalBufferCount++;
|
||||
bufHdr = LocalBufferAlloc(smgr, forkNum, blockNum, &found);
|
||||
if (found)
|
||||
LocalBufferHitCount++;
|
||||
pgBufferUsage.local_blks_hit++;
|
||||
else
|
||||
pgBufferUsage.local_blks_read++;
|
||||
}
|
||||
else
|
||||
{
|
||||
ReadBufferCount++;
|
||||
|
||||
/*
|
||||
* lookup the buffer. IO_IN_PROGRESS is set if the requested block is
|
||||
* not currently in memory.
|
||||
*/
|
||||
bufHdr = BufferAlloc(smgr, forkNum, blockNum, strategy, &found);
|
||||
if (found)
|
||||
BufferHitCount++;
|
||||
pgBufferUsage.shared_blks_hit++;
|
||||
else
|
||||
pgBufferUsage.shared_blks_read++;
|
||||
}
|
||||
|
||||
/* At this point we do NOT hold any locks. */
|
||||
@ -1610,54 +1612,6 @@ SyncOneBuffer(int buf_id, bool skip_recently_used)
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Return a palloc'd string containing buffer usage statistics.
|
||||
*/
|
||||
char *
|
||||
ShowBufferUsage(void)
|
||||
{
|
||||
StringInfoData str;
|
||||
float hitrate;
|
||||
float localhitrate;
|
||||
|
||||
initStringInfo(&str);
|
||||
|
||||
if (ReadBufferCount == 0)
|
||||
hitrate = 0.0;
|
||||
else
|
||||
hitrate = (float) BufferHitCount *100.0 / ReadBufferCount;
|
||||
|
||||
if (ReadLocalBufferCount == 0)
|
||||
localhitrate = 0.0;
|
||||
else
|
||||
localhitrate = (float) LocalBufferHitCount *100.0 / ReadLocalBufferCount;
|
||||
|
||||
appendStringInfo(&str,
|
||||
"!\tShared blocks: %10ld read, %10ld written, buffer hit rate = %.2f%%\n",
|
||||
ReadBufferCount - BufferHitCount, BufferFlushCount, hitrate);
|
||||
appendStringInfo(&str,
|
||||
"!\tLocal blocks: %10ld read, %10ld written, buffer hit rate = %.2f%%\n",
|
||||
ReadLocalBufferCount - LocalBufferHitCount, LocalBufferFlushCount, localhitrate);
|
||||
appendStringInfo(&str,
|
||||
"!\tDirect blocks: %10ld read, %10ld written\n",
|
||||
BufFileReadCount, BufFileWriteCount);
|
||||
|
||||
return str.data;
|
||||
}
|
||||
|
||||
void
|
||||
ResetBufferUsage(void)
|
||||
{
|
||||
BufferHitCount = 0;
|
||||
ReadBufferCount = 0;
|
||||
BufferFlushCount = 0;
|
||||
LocalBufferHitCount = 0;
|
||||
ReadLocalBufferCount = 0;
|
||||
LocalBufferFlushCount = 0;
|
||||
BufFileReadCount = 0;
|
||||
BufFileWriteCount = 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* AtEOXact_Buffers - clean up at end of transaction.
|
||||
*
|
||||
@ -1916,7 +1870,7 @@ FlushBuffer(volatile BufferDesc *buf, SMgrRelation reln)
|
||||
(char *) BufHdrGetBlock(buf),
|
||||
false);
|
||||
|
||||
BufferFlushCount++;
|
||||
pgBufferUsage.shared_blks_written++;
|
||||
|
||||
/*
|
||||
* Mark the buffer as clean (unless BM_JUST_DIRTIED has become set) and
|
||||
|
||||
@ -9,13 +9,14 @@
|
||||
*
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $PostgreSQL: pgsql/src/backend/storage/buffer/localbuf.c,v 1.87 2009/06/11 14:49:01 momjian Exp $
|
||||
* $PostgreSQL: pgsql/src/backend/storage/buffer/localbuf.c,v 1.88 2009/12/15 04:57:47 rhaas Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
#include "postgres.h"
|
||||
|
||||
#include "catalog/catalog.h"
|
||||
#include "executor/instrument.h"
|
||||
#include "storage/buf_internals.h"
|
||||
#include "storage/bufmgr.h"
|
||||
#include "storage/smgr.h"
|
||||
@ -209,7 +210,7 @@ LocalBufferAlloc(SMgrRelation smgr, ForkNumber forkNum, BlockNumber blockNum,
|
||||
/* Mark not-dirty now in case we error out below */
|
||||
bufHdr->flags &= ~BM_DIRTY;
|
||||
|
||||
LocalBufferFlushCount++;
|
||||
pgBufferUsage.local_blks_written++;
|
||||
}
|
||||
|
||||
/*
|
||||
|
||||
@ -7,7 +7,7 @@
|
||||
* Portions Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $PostgreSQL: pgsql/src/backend/storage/file/buffile.c,v 1.34 2009/06/11 14:49:01 momjian Exp $
|
||||
* $PostgreSQL: pgsql/src/backend/storage/file/buffile.c,v 1.35 2009/12/15 04:57:47 rhaas Exp $
|
||||
*
|
||||
* NOTES:
|
||||
*
|
||||
@ -34,6 +34,7 @@
|
||||
|
||||
#include "postgres.h"
|
||||
|
||||
#include "executor/instrument.h"
|
||||
#include "storage/fd.h"
|
||||
#include "storage/buffile.h"
|
||||
#include "storage/buf_internals.h"
|
||||
@ -240,7 +241,7 @@ BufFileLoadBuffer(BufFile *file)
|
||||
file->offsets[file->curFile] += file->nbytes;
|
||||
/* we choose not to advance curOffset here */
|
||||
|
||||
BufFileReadCount++;
|
||||
pgBufferUsage.temp_blks_read++;
|
||||
}
|
||||
|
||||
/*
|
||||
@ -304,7 +305,7 @@ BufFileDumpBuffer(BufFile *file)
|
||||
file->curOffset += bytestowrite;
|
||||
wpos += bytestowrite;
|
||||
|
||||
BufFileWriteCount++;
|
||||
pgBufferUsage.temp_blks_written++;
|
||||
}
|
||||
file->dirty = false;
|
||||
|
||||
|
||||
@ -8,7 +8,7 @@
|
||||
*
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $PostgreSQL: pgsql/src/backend/tcop/postgres.c,v 1.575 2009/11/04 22:26:06 tgl Exp $
|
||||
* $PostgreSQL: pgsql/src/backend/tcop/postgres.c,v 1.576 2009/12/15 04:57:47 rhaas Exp $
|
||||
*
|
||||
* NOTES
|
||||
* this is the "main" module of the postgres backend and
|
||||
@ -3901,7 +3901,6 @@ ResetUsage(void)
|
||||
{
|
||||
getrusage(RUSAGE_SELF, &Save_r);
|
||||
gettimeofday(&Save_t, NULL);
|
||||
ResetBufferUsage();
|
||||
}
|
||||
|
||||
void
|
||||
@ -3912,7 +3911,6 @@ ShowUsage(const char *title)
|
||||
sys;
|
||||
struct timeval elapse_t;
|
||||
struct rusage r;
|
||||
char *bufusage;
|
||||
|
||||
getrusage(RUSAGE_SELF, &r);
|
||||
gettimeofday(&elapse_t, NULL);
|
||||
@ -3986,10 +3984,6 @@ ShowUsage(const char *title)
|
||||
r.ru_nvcsw, r.ru_nivcsw);
|
||||
#endif /* HAVE_GETRUSAGE */
|
||||
|
||||
bufusage = ShowBufferUsage();
|
||||
appendStringInfo(&str, "! buffer usage stats:\n%s", bufusage);
|
||||
pfree(bufusage);
|
||||
|
||||
/* remove trailing newline */
|
||||
if (str.data[str.len - 1] == '\n')
|
||||
str.data[--str.len] = '\0';
|
||||
|
||||
@ -8,7 +8,7 @@
|
||||
*
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $PostgreSQL: pgsql/src/backend/tcop/pquery.c,v 1.132 2009/10/10 01:43:49 tgl Exp $
|
||||
* $PostgreSQL: pgsql/src/backend/tcop/pquery.c,v 1.133 2009/12/15 04:57:47 rhaas Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
@ -67,7 +67,7 @@ CreateQueryDesc(PlannedStmt *plannedstmt,
|
||||
Snapshot crosscheck_snapshot,
|
||||
DestReceiver *dest,
|
||||
ParamListInfo params,
|
||||
bool doInstrument)
|
||||
int instrument_options)
|
||||
{
|
||||
QueryDesc *qd = (QueryDesc *) palloc(sizeof(QueryDesc));
|
||||
|
||||
@ -80,7 +80,7 @@ CreateQueryDesc(PlannedStmt *plannedstmt,
|
||||
qd->crosscheck_snapshot = RegisterSnapshot(crosscheck_snapshot);
|
||||
qd->dest = dest; /* output dest */
|
||||
qd->params = params; /* parameter values passed into query */
|
||||
qd->doInstrument = doInstrument; /* instrumentation wanted? */
|
||||
qd->instrument_options = instrument_options; /* instrumentation wanted? */
|
||||
|
||||
/* null these fields until set by ExecutorStart */
|
||||
qd->tupDesc = NULL;
|
||||
@ -111,7 +111,7 @@ CreateUtilityQueryDesc(Node *utilitystmt,
|
||||
qd->crosscheck_snapshot = InvalidSnapshot; /* RI check snapshot */
|
||||
qd->dest = dest; /* output dest */
|
||||
qd->params = params; /* parameter values passed into query */
|
||||
qd->doInstrument = false; /* uninteresting for utilities */
|
||||
qd->instrument_options = false; /* uninteresting for utilities */
|
||||
|
||||
/* null these fields until set by ExecutorStart */
|
||||
qd->tupDesc = NULL;
|
||||
@ -178,7 +178,7 @@ ProcessQuery(PlannedStmt *plan,
|
||||
*/
|
||||
queryDesc = CreateQueryDesc(plan, sourceText,
|
||||
GetActiveSnapshot(), InvalidSnapshot,
|
||||
dest, params, false);
|
||||
dest, params, 0);
|
||||
|
||||
/*
|
||||
* Set up to collect AFTER triggers
|
||||
@ -515,7 +515,7 @@ PortalStart(Portal portal, ParamListInfo params, Snapshot snapshot)
|
||||
InvalidSnapshot,
|
||||
None_Receiver,
|
||||
params,
|
||||
false);
|
||||
0);
|
||||
|
||||
/*
|
||||
* We do *not* call AfterTriggerBeginQuery() here. We assume
|
||||
|
||||
@ -6,7 +6,7 @@
|
||||
* Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
|
||||
* Portions Copyright (c) 1994-5, Regents of the University of California
|
||||
*
|
||||
* $PostgreSQL: pgsql/src/include/commands/explain.h,v 1.43 2009/12/12 00:35:34 rhaas Exp $
|
||||
* $PostgreSQL: pgsql/src/include/commands/explain.h,v 1.44 2009/12/15 04:57:47 rhaas Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
@ -30,6 +30,7 @@ typedef struct ExplainState
|
||||
bool verbose; /* be verbose */
|
||||
bool analyze; /* print actual times */
|
||||
bool costs; /* print costs */
|
||||
bool buffers; /* print buffer usage */
|
||||
ExplainFormat format; /* output format */
|
||||
/* other states */
|
||||
PlannedStmt *pstmt; /* top of plan */
|
||||
|
||||
@ -8,7 +8,7 @@
|
||||
* Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
|
||||
* Portions Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* $PostgreSQL: pgsql/src/include/executor/execdesc.h,v 1.40 2009/01/02 20:42:00 tgl Exp $
|
||||
* $PostgreSQL: pgsql/src/include/executor/execdesc.h,v 1.41 2009/12/15 04:57:48 rhaas Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
@ -42,7 +42,7 @@ typedef struct QueryDesc
|
||||
Snapshot crosscheck_snapshot; /* crosscheck for RI update/delete */
|
||||
DestReceiver *dest; /* the destination for tuple output */
|
||||
ParamListInfo params; /* param values being passed in */
|
||||
bool doInstrument; /* TRUE requests runtime instrumentation */
|
||||
int instrument_options; /* OR of InstrumentOption flags */
|
||||
|
||||
/* These fields are set by ExecutorStart */
|
||||
TupleDesc tupDesc; /* descriptor for result tuples */
|
||||
@ -60,7 +60,7 @@ extern QueryDesc *CreateQueryDesc(PlannedStmt *plannedstmt,
|
||||
Snapshot crosscheck_snapshot,
|
||||
DestReceiver *dest,
|
||||
ParamListInfo params,
|
||||
bool doInstrument);
|
||||
int instrument_options);
|
||||
|
||||
extern QueryDesc *CreateUtilityQueryDesc(Node *utilitystmt,
|
||||
const char *sourceText,
|
||||
|
||||
@ -7,7 +7,7 @@
|
||||
* Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
|
||||
* Portions Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* $PostgreSQL: pgsql/src/include/executor/executor.h,v 1.164 2009/12/07 05:22:23 tgl Exp $
|
||||
* $PostgreSQL: pgsql/src/include/executor/executor.h,v 1.165 2009/12/15 04:57:48 rhaas Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
@ -161,7 +161,7 @@ extern void InitResultRelInfo(ResultRelInfo *resultRelInfo,
|
||||
Relation resultRelationDesc,
|
||||
Index resultRelationIndex,
|
||||
CmdType operation,
|
||||
bool doInstrument);
|
||||
int instrument_options);
|
||||
extern ResultRelInfo *ExecGetTriggerResultRel(EState *estate, Oid relid);
|
||||
extern bool ExecContextForcesOids(PlanState *planstate, bool *hasoids);
|
||||
extern void ExecConstraints(ResultRelInfo *resultRelInfo,
|
||||
|
||||
@ -6,7 +6,7 @@
|
||||
*
|
||||
* Copyright (c) 2001-2009, PostgreSQL Global Development Group
|
||||
*
|
||||
* $PostgreSQL: pgsql/src/include/executor/instrument.h,v 1.20 2009/01/01 17:23:59 momjian Exp $
|
||||
* $PostgreSQL: pgsql/src/include/executor/instrument.h,v 1.21 2009/12/15 04:57:48 rhaas Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
@ -16,22 +16,46 @@
|
||||
#include "portability/instr_time.h"
|
||||
|
||||
|
||||
typedef struct BufferUsage
|
||||
{
|
||||
long shared_blks_hit; /* # of shared buffer hits */
|
||||
long shared_blks_read; /* # of shared disk blocks read */
|
||||
long shared_blks_written; /* # of shared disk blocks written */
|
||||
long local_blks_hit; /* # of local buffer hits */
|
||||
long local_blks_read; /* # of local disk blocks read */
|
||||
long local_blks_written; /* # of local disk blocks written */
|
||||
long temp_blks_read; /* # of temp blocks read */
|
||||
long temp_blks_written; /* # of temp blocks written */
|
||||
} BufferUsage;
|
||||
|
||||
typedef enum InstrumentOption
|
||||
{
|
||||
INSTRUMENT_TIMER = 1 << 0, /* needs timer */
|
||||
INSTRUMENT_BUFFERS = 1 << 1, /* needs buffer usage */
|
||||
INSTRUMENT_ALL = 0x7FFFFFFF
|
||||
} InstrumentOption;
|
||||
|
||||
typedef struct Instrumentation
|
||||
{
|
||||
/* Info about current plan cycle: */
|
||||
bool running; /* TRUE if we've completed first tuple */
|
||||
bool needs_bufusage; /* TRUE if we need buffer usage */
|
||||
instr_time starttime; /* Start time of current iteration of node */
|
||||
instr_time counter; /* Accumulated runtime for this node */
|
||||
double firsttuple; /* Time for first tuple of this cycle */
|
||||
double tuplecount; /* Tuples emitted so far this cycle */
|
||||
BufferUsage bufusage_start; /* Buffer usage at start */
|
||||
/* Accumulated statistics across all completed cycles: */
|
||||
double startup; /* Total startup time (in seconds) */
|
||||
double total; /* Total total time (in seconds) */
|
||||
double ntuples; /* Total tuples produced */
|
||||
double nloops; /* # of run cycles for this node */
|
||||
BufferUsage bufusage; /* Total buffer usage */
|
||||
} Instrumentation;
|
||||
|
||||
extern Instrumentation *InstrAlloc(int n);
|
||||
extern BufferUsage pgBufferUsage;
|
||||
|
||||
extern Instrumentation *InstrAlloc(int n, int instrument_options);
|
||||
extern void InstrStartNode(Instrumentation *instr);
|
||||
extern void InstrStopNode(Instrumentation *instr, double nTuples);
|
||||
extern void InstrEndLoop(Instrumentation *instr);
|
||||
|
||||
@ -7,7 +7,7 @@
|
||||
* Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
|
||||
* Portions Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* $PostgreSQL: pgsql/src/include/nodes/execnodes.h,v 1.213 2009/12/07 05:22:23 tgl Exp $
|
||||
* $PostgreSQL: pgsql/src/include/nodes/execnodes.h,v 1.214 2009/12/15 04:57:48 rhaas Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
@ -370,7 +370,7 @@ typedef struct EState
|
||||
uint32 es_processed; /* # of tuples processed */
|
||||
Oid es_lastoid; /* last oid processed (by INSERT) */
|
||||
|
||||
bool es_instrument; /* true requests runtime instrumentation */
|
||||
int es_instrument; /* OR of InstrumentOption flags */
|
||||
bool es_select_into; /* true if doing SELECT INTO */
|
||||
bool es_into_oids; /* true to generate OIDs in SELECT INTO */
|
||||
|
||||
|
||||
@ -8,7 +8,7 @@
|
||||
* Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
|
||||
* Portions Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* $PostgreSQL: pgsql/src/include/storage/buf_internals.h,v 1.102 2009/06/11 14:49:12 momjian Exp $
|
||||
* $PostgreSQL: pgsql/src/include/storage/buf_internals.h,v 1.103 2009/12/15 04:57:48 rhaas Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
@ -173,16 +173,6 @@ extern PGDLLIMPORT BufferDesc *BufferDescriptors;
|
||||
/* in localbuf.c */
|
||||
extern BufferDesc *LocalBufferDescriptors;
|
||||
|
||||
/* event counters in buf_init.c */
|
||||
extern long int ReadBufferCount;
|
||||
extern long int ReadLocalBufferCount;
|
||||
extern long int BufferHitCount;
|
||||
extern long int LocalBufferHitCount;
|
||||
extern long int BufferFlushCount;
|
||||
extern long int LocalBufferFlushCount;
|
||||
extern long int BufFileReadCount;
|
||||
extern long int BufFileWriteCount;
|
||||
|
||||
|
||||
/*
|
||||
* Internal routines: only called by bufmgr
|
||||
|
||||
@ -7,7 +7,7 @@
|
||||
* Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
|
||||
* Portions Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* $PostgreSQL: pgsql/src/include/storage/bufmgr.h,v 1.121 2009/06/11 14:49:12 momjian Exp $
|
||||
* $PostgreSQL: pgsql/src/include/storage/bufmgr.h,v 1.122 2009/12/15 04:57:48 rhaas Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
@ -173,8 +173,6 @@ extern Buffer ReleaseAndReadBuffer(Buffer buffer, Relation relation,
|
||||
extern void InitBufferPool(void);
|
||||
extern void InitBufferPoolAccess(void);
|
||||
extern void InitBufferPoolBackend(void);
|
||||
extern char *ShowBufferUsage(void);
|
||||
extern void ResetBufferUsage(void);
|
||||
extern void AtEOXact_Buffers(bool isCommit);
|
||||
extern void PrintBufferLeakWarning(Buffer buffer);
|
||||
extern void CheckPointBuffers(int flags);
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user