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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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3
src/include/commands/explain.h
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@ -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 */