From: | Pierre-Frédéric Caillaud <lists(at)boutiquenumerique(dot)com> |
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To: | pgsql-performance(at)postgresql(dot)org |
Subject: | Re: scalability issues on win32 |
Date: | 2004-11-22 23:15:26 |
Message-ID: | opshv2v01gcq72hf@musicbox |
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Lists: | pgsql-hackers-win32 pgsql-performance |
> Test platform:
> Pentium 4 3.06 GHz/HT
> 10k SATA Raptor
> 1Gb memory
> Windows XP Pro SP2/Redhat Fedora 3 (64 bit results coming soon)
Could you please add information about...
- filesystems ?
- windows configured as "network server" or as "desktop box" ?
- virtual memory
In my experience you MUST deactivate virtual memory on a Windows box to
avoid catastrophic competition between virtual memory and disk cache
- respective pgsql configurations (buffers...) identical ?
- explain analyze for the two, identical ?
- client on same machine or via network (100Mb ? 1G ?)
- size of the data set involved in query
- first query time after boot (with nothing in the cache), and times for
the next disk-cached runs ?
- are the N users doing the same query or exercising different parts of
the dataset ?
You don't do any writes in your test do you ? Just big SELECTs ?
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