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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
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@ -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';