Greg Smith writes:
The results I get now look fishy.
There are at least two things wrong with this program:

* It does not respect the alignment requirement for O_DIRECT buffers
(reportedly either 512 or 4096 bytes depending on filesystem).

* It does not check for errors (if it had, you might have realized the
other problem).

regards, tom lane

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grouppgsql-performance @
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postedNov 23, '06 at 6:40a
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