<br /><blockquote cite="midPine.LNX.4.58.0511291513260.18370@linuxworld.com.au" type="cite"><pre wrap="">
The paper I linked to seemed to suggest that they weren't using async IO
in 9.2 -- which is fairly old. I'm not sure why the authors didn't test
10g. </pre></blockquote> ...<reads paper>... ok, interesting. Did they say that Oracle isn't using aio ?<br /> I
can'tsee that. They that Oracle has no more than one outstanding I/O <br /> operation in flight per concurrent query,
<br/> and they appear to think that's a bad thing. I'm not seeing<br /> that myself. Perhaps once I sleep on it, it'll
becomeclear what they're getting at.<br /><br /> One theory for lack of aio in Oracle as tested in that paper would be
thatthey<br /> were testing on Linux. Since aio is relatively new in Linux I wouldn't be surprised<br /> if Oracle
didn'tactually use it until it's known to be widely deployed in the field<br /> and to have proven reliability. Perhaps
we'vereached that state around now,<br /> and so Oracle may not yet have released an aio-capable Linux version of
their<br/> RDBMS. Just a theory...someone from those tubular towers lurking here<br /> could tell us for sure I
guess...<br/><br /><br /><br /><br />