Re: further testing on IDE drives

Vivek Khera wrote:
> >>>>> "BM" == Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
>
> >> Sounds reasonable to me. Are there many / any scenarios where a plain
> >> fsync would be faster than open_sync?
>
> BM> Yes. If you were doing multiple WAL writes before transaction fsync,
> BM> you would be fsyncing every write, rather than doing two writes and
> BM> fsync'ing them both. I wonder if larger transactions would find
> BM> open_sync slower?
>
> consider loading a large database from a backup dump. one big
> transaction during the COPY. I don't know the implications it has on
> this scenario, though.

COPY only does fsync on COPY completion, so I am not sure there are
enough fsync's there to make a difference.

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