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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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5
src/backend/storage/buffer/localbuf.c
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@ -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++;
}
/*