On Tue, 2007-08-07 at 13:16 +0100, Heikki Linnakangas wrote: > I ran some CPU intensive pgbench tests on HOT. Results are not > surprising, HOT makes practically no difference on the total transaction > rate, but reduces the need to vacuum: > > unpatched HOT > tps 3680 3790 > WAL written(MB) 5386 4804 > checkpoints 10 9 > autovacuums 116 43 > autoanalyzes 139 60
Nor would I expect anything else, on this test. The pgbench database has 4 tables, of which 3 have one index and 1 has no indexes at all. A table without indexes is uncommon and most major entities such as accounts have 2-3 indexes if not more. So I would be inclined to add a PK to HISTORY and add two additional indexes to ACCOUNTS and then repeat the test to see what difference it makes. -- Simon Riggs EnterpriseDB http://www.enterprisedb.com ---------------------------(end of broadcast)--------------------------- TIP 5: don't forget to increase your free space map settings
