Re: [HACKERS] PostgreSQL Tuning Results

Gavin Sherry wrote:

>Hi Chris,
>
>On Wed, 12 Feb 2003, Christopher Kings-Lynne wrote:
>
>
>
>>Machine:
>>256MB RAM, FreeBSD 4.7, EIDE HDD, > 1 Ghz
>>
>>
>
>Seems like a small amount of memory to be memory based tests with.
>
>What about testing sort_mem as well. It would system to me that there
>would be no negative to having infinite sort_mem given infinite memory,
>though.
>
>Gavin
>
>
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Be careful with sort_mem - this might lead to VERY unexpected results. I
did some testing on my good old Athlon 500 with a brand new IBM 120 Gigs
HDD. Reducing the sort_mem gave me significantly faster results when
sorting/indexing 20.000.000 randon rows.
However, it would be nice to see the results of concurrent sorts.

Hans

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