Re: Execution time of UPDATE raises dramatically!

From: Peter Eisentraut <peter_e(at)gmx(dot)net>
To: Vladimir Zamiussky <zami(at)chat(dot)ru>
Cc: <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Execution time of UPDATE raises dramatically!
Date: 2002-02-01 20:58:47
Message-ID: Pine.LNX.4.30.0202011557490.687-100000@peter.localdomain
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Vladimir Zamiussky writes:

> When I do UPDATE some_table set value=... where id=...,
> query execution time raises in arithmetic progression!
> After about 50 updates on every row query consumes ~3 sec against 0.3
> sec as it was at the beginning.
> psql takes ~80% of CPU time (acording to top).
> VACUUM helps to restore execution speed, but i think it is not the way out.
>
> Is it BUG or FEATURE?

It's just a fact of how the system works.

--
Peter Eisentraut peter_e(at)gmx(dot)net

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