| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Greg Stark <gsstark(at)mit(dot)edu> |
| Cc: | Vitaly Belman <vitalib(at)012(dot)net(dot)il>, pgsql-performance(at)postgresql(dot)org, Bryan Encina <bryan(dot)encina(at)valleypres(dot)org>, Matthew Nuzum <cobalt(at)bearfruit(dot)org> |
| Subject: | Re: PostgreSQL on VMWare vs Windows vs CoLinux |
| Date: | 2004-06-02 15:24:55 |
| Message-ID: | 24744.1086189895@sss.pgh.pa.us |
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| Lists: | pgsql-performance |
Greg Stark <gsstark(at)mit(dot)edu> writes:
> That said, I'm curious why the emulated servers performed better than the
> Native Windows port. My first thought is that they probably aren't syncing
> every write to disk so effectively they're defeating the fsyncs, allowing the
> host OS to buffer disk writes.
It would be fairly easy to check this by repeating the comparisons with
fsync = off in postgresql.conf. A performance number that doesn't
change much would be a smoking gun ;-).
The native port hasn't had any performance testing done on it yet, and
I wouldn't be surprised to hear of a gotcha or two. Perhaps with the
recent schedule change there will be some time for performance tuning
before we go beta.
regards, tom lane
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