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.

1 files changed, 1 insertions, 3 deletions

diff --git a/src/include/storage/bufmgr.h b/src/include/storage/bufmgr.h
index af3562a79df..8fdb22f0fa9 100644
--- a/src/include/storage/bufmgr.h
+++ b/src/include/storage/bufmgr.h
@@ -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);