| From: | Arnaud Lesauvage <thewild(at)freesurf(dot)fr> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Ragnar <gnari(at)hive(dot)is>, Jens Schipkowski <jens(dot)schipkowski(at)apus(dot)co(dot)at>, pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: Slow update with simple query |
| Date: | 2006-12-14 16:26:23 |
| Message-ID: | 45817B2F.7070502@freesurf.fr |
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| Lists: | pgsql-performance |
Tom Lane a écrit :
> I think the conclusion must be that there was just too much I/O to be
> done to update all the rows. Have you done any tuning of shared_buffers
> and so forth? I recall having seen cases where update performance went
> bad as soon as the upper levels of a large index no longer fit into
> shared_buffers ...
Yes, that's probably it.
I think my raid1 array's performances are very bad.
I am switching to a brand new hardware next week, I am quite confident that this
will solve many problems.
Thanks for helping !
Regards
--
Arnaud
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