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Install infrastructure for shared-memory free space map. Doesn't actually

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do anything yet, but it has the necessary connections to initialization
and so forth.  Make some gestures towards allowing number of blocks in
a relation to be BlockNumber, ie, unsigned int, rather than signed int.
(I doubt I got all the places that are sloppy about it, yet.)  On the
way, replace the hardwired NLOCKS_PER_XACT fudge factor with a GUC
variable.
This commit is contained in:
Tom Lane
2001-06-27 23:31:40 +00:00
parent b559382134
commit e0c9301c87
26 changed files with 572 additions and 316 deletions
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7
src/backend/access/nbtree/nbtpage.c
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@@ -9,7 +9,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/access/nbtree/nbtpage.c,v 1.51 2001/03/22 03:59:14 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/access/nbtree/nbtpage.c,v 1.52 2001/06/27 23:31:38 tgl Exp $
*
* NOTES
* Postgres btree pages look like ordinary relation pages. The opaque
@@ -55,7 +55,6 @@ _bt_metapinit(Relation rel)
{
Buffer buf;
Page pg;
int nblocks;
BTMetaPageData metad;
BTPageOpaque op;
@@ -63,11 +62,9 @@ _bt_metapinit(Relation rel)
if (USELOCKING)
LockRelation(rel, AccessExclusiveLock);
if ((nblocks = RelationGetNumberOfBlocks(rel)) != 0)
{
if (RelationGetNumberOfBlocks(rel) != 0)
elog(ERROR, "Cannot initialize non-empty btree %s",
RelationGetRelationName(rel));
}
buf = ReadBuffer(rel, P_NEW);
pg = BufferGetPage(buf);