Re: interesting benchmarks PG/Firebird Linux/Windows fsync/nofsync

From: Bruce Momjian
Subject: Re: interesting benchmarks PG/Firebird Linux/Windows fsync/nofsync
Date: ,
Msg-id: 200503151355.j2FDtYi13867@candle.pha.pa.us
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In response to: interesting benchmarks PG/Firebird Linux/Windows fsync/nofsync  (Chris Mair)
List: pgsql-performance


Chris Mair wrote:
> Timings are in msec, note that you cannot directly
> compare Windows and Linux Performance, since machines
> were different.
>
> You can, however, compare PG to Firebird, and you
> can see the effect of the 3 varied parametert.
>
> One thing that stands out is how terribly
> bad Windows performed with many small single
> transactions and fsync=true.
>
> Appearantly fsync on Windows is a very costly
> operation.

Yes, we now enable FILE_FLAG_WRITE_THROUGH on Win32 for open_sync and I
am about to open a discussion whether this should be the default for
Win32, and whether we should backpatch this to 8.0.X.

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