Re: Slow update with simple query

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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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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