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Add an EXPLAIN (BUFFERS) option to show buffer-usage statistics.

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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
2009-12-15 04:57:48 +00:00
parent 6f1bf75d50
commit cddca5ec13
25 changed files with 274 additions and 140 deletions
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8
src/backend/tcop/postgres.c
View File

@@ -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';

12
src/backend/tcop/pquery.c
View File

@@ -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