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Make heap_fetch API more consistent by having the buffer remain pinned

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in all cases when keep_buf = true.  This allows ANALYZE's inner loop to
use heap_release_fetch, which saves multiple buffer lookups for the same
page and avoids overestimation of cost by the vacuum cost mechanism.
This commit is contained in:
Tom Lane
2004-10-26 16:05:03 +00:00
parent 2c66dcf684
commit 83cd2d8b0f
3 changed files with 31 additions and 28 deletions
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4
src/backend/access/nbtree/nbtinsert.c
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@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/access/nbtree/nbtinsert.c,v 1.117 2004/10/15 22:39:49 tgl Exp $
* $PostgreSQL: pgsql/src/backend/access/nbtree/nbtinsert.c,v 1.118 2004/10/26 16:05:02 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -269,8 +269,8 @@ _bt_check_unique(Relation rel, BTItem btitem, Relation heapRel,
SetBufferCommitInfoNeedsSave(buf);
}
LockBuffer(hbuffer, BUFFER_LOCK_UNLOCK);
ReleaseBuffer(hbuffer);
}
ReleaseBuffer(hbuffer);
}
}