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Reduce size of critical section and remove call of user-defined functions in

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insertion and deletion, modify gistSplit() to do not use buffers.

 TODO: gistvacuumcleanup and XLOG
This commit is contained in:
Teodor Sigaev
2006-05-10 09:19:54 +00:00
parent 12049d343e
commit 10dd8df68e
5 changed files with 259 additions and 264 deletions
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26
src/backend/access/gist/gistutil.c
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@ -8,7 +8,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/access/gist/gistutil.c,v 1.10 2006/03/05 15:58:20 momjian Exp $
* $PostgreSQL: pgsql/src/backend/access/gist/gistutil.c,v 1.11 2006/05/10 09:19:54 teodor Exp $
*-------------------------------------------------------------------------
*/
#include "postgres.h"
@ -81,15 +81,31 @@ gistfillbuffer(Relation r, Page page, IndexTuple *itup,
* Check space for itup vector on page
*/
bool
gistnospace(Page page, IndexTuple *itvec, int len)
gistnospace(Page page, IndexTuple *itvec, int len, OffsetNumber todelete)
{
unsigned int size = 0;
unsigned int size = 0, deleted = 0;
int i;
for (i = 0; i < len; i++)
size += IndexTupleSize(itvec[i]) + sizeof(ItemIdData);
return (PageGetFreeSpace(page) < size);
if ( todelete != InvalidOffsetNumber ) {
IndexTuple itup = (IndexTuple) PageGetItem(page, PageGetItemId(page, todelete));
deleted = IndexTupleSize(itup) + sizeof(ItemIdData);
}
return (PageGetFreeSpace(page) + deleted < size);
}
bool
gistfitpage(IndexTuple *itvec, int len) {
int i;
Size size=0;
for(i=0;i<len;i++)
size += IndexTupleSize(itvec[i]) + sizeof(ItemIdData);
return (size <= GiSTPageSize);
}
/*
@ -107,7 +123,7 @@ gistextractbuffer(Buffer buffer, int *len /* out */ )
*len = maxoff;
itvec = palloc(sizeof(IndexTuple) * maxoff);
for (i = FirstOffsetNumber; i <= maxoff; i = OffsetNumberNext(i))
itvec[i - 1] = (IndexTuple) PageGetItem(p, PageGetItemId(p, i));
itvec[i - FirstOffsetNumber] = (IndexTuple) PageGetItem(p, PageGetItemId(p, i));
return itvec;
}