| From: | Heikki Linnakangas <heikki(at)enterprisedb(dot)com> |
|---|---|
| To: | Heikki Linnakangas <heikki(at)enterprisedb(dot)com> |
| Cc: | pgsql-patches(at)postgresql(dot)org, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Bruce Momjian <bruce(at)momjian(dot)us>, Gregory Stark <gsstark(at)mit(dot)edu>, ITAGAKI Takahiro <itagaki(dot)takahiro(at)oss(dot)ntt(dot)co(dot)jp> |
| Subject: | Re: Recalculating OldestXmin in a long-running vacuum |
| Date: | 2007-03-13 12:38:31 |
| Message-ID: | 45F69B47.8060406@enterprisedb.com |
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| Thread: | |
| Lists: | pgsql-patches |
Heikki Linnakangas wrote:
> I am, but I doubt that's it. The response times are dominated by I/O, so
> any increase in lock contention would hardly show up. And the patch is
> only adding one GetOldestXmin call every 1000 scanned pages, which is
Sorry, should be "every 100 scanned pages". The argument still holds,
though.
--
Heikki Linnakangas
EnterpriseDB http://www.enterprisedb.com
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