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Restructure local-buffer handling per recent pghackers discussion.

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The local buffer manager is no longer used for newly-created relations
(unless they are TEMP); a new non-TEMP relation goes through the shared
bufmgr and thus will participate normally in checkpoints.  But TEMP relations
use the local buffer manager throughout their lifespan.  Also, operations
in TEMP relations are not logged in WAL, thus improving performance.
Since it's no longer necessary to fsync relations as they move out of the
local buffers into shared buffers, quite a lot of smgr.c/md.c/fd.c code
is no longer needed and has been removed: there's no concept of a dirty
relation anymore in md.c/fd.c, and we never fsync anything but WAL.
Still TODO: improve local buffer management algorithms so that it would
be reasonable to increase NLocBuffer.
This commit is contained in:
Tom Lane
2002-08-06 02:36:35 +00:00
parent 35cd432b18
commit 5df307c778
28 changed files with 543 additions and 955 deletions
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6
src/include/utils/relcache.h
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@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: relcache.h,v 1.33 2002/08/02 22:36:05 tgl Exp $
* $Id: relcache.h,v 1.34 2002/08/06 02:36:35 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -61,9 +61,7 @@ extern void RelationIdInvalidateRelationCacheByRelationId(Oid relationId);
extern void RelationCacheInvalidate(void);
extern void RelationPurgeLocalRelation(bool xactComitted);
extern void AtEOXactRelationCache(bool commit);
extern void AtEOXact_RelationCache(bool commit);
/*
* Routines to help manage rebuilding of relcache init file