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Re: tsearch2 poor performance

From: Oleg Bartunov <oleg(at)sai(dot)msu(dot)su>
To: Kris Kiger <kris(at)musicrebellion(dot)com>
Cc: pgsql-admin(at)postgresql(dot)org
Subject: Re: tsearch2 poor performance
Date: 2004-09-27 17:02:37
Message-ID: Pine.GSO.4.58.0409272040090.14980@ra.sai.msu.su (view raw or flat)
Thread:
Lists: pgsql-adminpgsql-hackers
Kris,

do you actually have only 508 disctinct words ? Could you try
more complex queries, say 2-3 words. Does these queries run faster ?


	Oleg
On Mon, 27 Sep 2004, Kris Kiger wrote:

> Regardless of caching, the queries are still taking 19~20 seconds to run
> on the 3,000,000 rows.  I've played with performance tuning and nothing
> seems to make much of a difference.  If I am reading that list from stat
> correctly, then I am operating on  508 distinct words.  Is this the
> performance I should expect from tsearch2?  Or is something still awry?
>  I'm inclined to think  something else is wrong, after reading some
> other people's tsearch performance stats.  Thanks!
>
> Kris
>
>
>
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	Regards,
		Oleg
_____________________________________________________________
Oleg Bartunov, sci.researcher, hostmaster of AstroNet,
Sternberg Astronomical Institute, Moscow University (Russia)
Internet: oleg(at)sai(dot)msu(dot)su, http://www.sai.msu.su/~megera/
phone: +007(095)939-16-83, +007(095)939-23-83

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