On 2005-08-12, Alvaro Herrera <alvherre@alvh.no-ip.org> wrote:
> In light of this, may I ask whether it makes sense to compare the
> performance of two runs with similar shared_buffer settings? With
> O_DIRECT, I understand from this manpage that the OS is going to do
> little or no page caching, so shared_buffers should be increased to
> account for this fact.
>
> Am I missing something?
O_DIRECT should only be being used for the WAL, not for buffer I/O.
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Andrew, Supernews
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