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1. LocalBufferSync(): set nextFreeLocalBuf to 0 - we're freeing 

all local buffers @ xact commit, so accordingly nextFreeLocalBuf
   is first local buffer now.
   It helps to avoid unnecessary local buffer allocations in LocalBufferAlloc()
   latter ("memmory leaks" in 'order by').
2. ResetLocalBufferPool() lost allocated local buffers:

   memset(LocalBufferDescriptors, 0, sizeof(BufferDesc) * NLocBuffer);

   (local buffers leak @ xact aborts).
This commit is contained in:
Vadim B. Mikheev 1997-05-20 11:30:32 +00:00
parent 4a8c3dddc3
commit e7f7cf4a1c
1 changed files with 7 additions and 6 deletions
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13
src/backend/storage/buffer/localbuf.c
View File

@ -15,7 +15,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/storage/buffer/localbuf.c,v 1.6 1997/04/18 02:53:37 vadim Exp $
* $Header: /cvsroot/pgsql/src/backend/storage/buffer/localbuf.c,v 1.7 1997/05/20 11:30:32 vadim Exp $
*
*-------------------------------------------------------------------------
*/
@ -273,6 +273,7 @@ LocalBufferSync(void)
}
memset(LocalRefCount, 0, sizeof(long) * NLocBuffer);
nextFreeLocalBuf = 0;
}
void
@ -280,15 +281,15 @@ ResetLocalBufferPool(void)
{
int i;
memset(LocalBufferDescriptors, 0, sizeof(BufferDesc) * NLocBuffer);
nextFreeLocalBuf = 0;
for (i = 0; i < NLocBuffer; i++) {
for (i = 0; i < NLocBuffer; i++)
{
BufferDesc *buf = &LocalBufferDescriptors[i];
/* just like InitLocalBuffer() */
buf->tag.relId.relId = InvalidOid;
buf->flags &= ~BM_DIRTY;
buf->buf_id = - i - 2;
}
memset(LocalRefCount, 0, sizeof(long) * NLocBuffer);
nextFreeLocalBuf = 0;
}