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Fix up pgstats counting of live and dead tuples to recognize that committed

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and aborted transactions have different effects; also teach it not to assume
that prepared transactions are always committed.

Along the way, simplify the pgstats API by tying counting directly to
Relations; I cannot detect any redeeming social value in having stats
pointers in HeapScanDesc and IndexScanDesc structures.  And fix a few
corner cases in which counts might be missed because the relation's
pgstat_info pointer hadn't been set.
This commit is contained in:
Tom Lane
2007-05-27 03:50:39 +00:00
parent cadb78330e
commit 77947c51c0
20 changed files with 805 additions and 417 deletions
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4
src/backend/access/gist/gistget.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/gistget.c,v 1.65 2007/04/06 22:33:41 tgl Exp $
* $PostgreSQL: pgsql/src/backend/access/gist/gistget.c,v 1.66 2007/05/27 03:50:38 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -165,7 +165,7 @@ gistnext(IndexScanDesc scan, ScanDirection dir, ItemPointer tids,
stk->next = NULL;
stk->block = GIST_ROOT_BLKNO;
pgstat_count_index_scan(&scan->xs_pgstat_info);
pgstat_count_index_scan(scan->indexRelation);
}
else if (so->curbuf == InvalidBuffer)
{