Re: tsearch2 poor performance

Josh,

    I am running my tests on a dual processor PIII 1 GHz machine with
2Gb of RAM.  There are four hard drives set up.  One for OS/logging and
three in a raid-5 configuration for the postgres data directory.

Kris

Joshua D. Drake wrote:

> Hello,
> I might of missed this on a previous message, BUT what type of
> hardware are we dealing with here? Is it possible that we just don't
> have enough IO/RAM to push this?
> J
> Kris Kiger wrote:
>
>> Oleg,
>>    Thanks for the help on this.
>>    The query I used to return the 508 number is:
>>         SELECT * FROM stat('SELECT vector FROM product') ORDER BY
>> ndoc desc, word ;
>>      Testing says, the more words I use, the faster the query is.  My
>> original search word, 'oil', appears in 226,357 documents 233,266
>> times. As far as distinct words go, 'oil' is middle of the road for
>> occurences.  As it is set up now, the best search time I am getting
>> on this single word is roughly 22 seconds. Kris
>>
>> Oleg Bartunov wrote:
>>
>>> 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
>>>
>>>     Regards,
>>>         Oleg
>>


--
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Kris Kiger
Software Developer
Digonex Technologies, Inc.
317.638.4174 Fax


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