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Tweak fillfactor code as per my recent proposal. Fix nbtsort.c so that

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it can handle small fillfactors for ordinary-sized index entries without
failing on large ones; fix nbtinsert.c to distinguish leaf and nonleaf
pages; change the minimum fillfactor to 10% for all index types.
This commit is contained in:
Tom Lane
2006-07-11 21:05:57 +00:00
parent 1be8f80288
commit d29b66882a
7 changed files with 41 additions and 28 deletions
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12
src/include/access/nbtree.h
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@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/access/nbtree.h,v 1.100 2006/07/03 22:45:39 tgl Exp $
* $PostgreSQL: pgsql/src/include/access/nbtree.h,v 1.101 2006/07/11 21:05:57 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -107,11 +107,15 @@ typedef struct BTMetaPageData
MAXALIGN(sizeof(BTPageOpaqueData))) / 3 - sizeof(ItemIdData))
/*
* Because of above, min fillfactor can't be less than 2/3rds; see notes in
* nbtsort.c before you change these!
* The leaf-page fillfactor defaults to 90% but is user-adjustable.
* For pages above the leaf level, we use a fixed 70% fillfactor.
* The fillfactor is applied during index build and when splitting
* a rightmost page; when splitting non-rightmost pages we try to
* divide the data equally.
*/
#define BTREE_MIN_FILLFACTOR 70
#define BTREE_MIN_FILLFACTOR 10
#define BTREE_DEFAULT_FILLFACTOR 90
#define BTREE_NONLEAF_FILLFACTOR 70
/*
* Test whether two btree entries are "the same".