From: Martijn van Oosterhout <kleptog@svana.org>
To: David Boreham <david_list@boreham.org>
Cc: pgsql-hackers@postgresql.org
Subject: Re: ice-broker scan thread
Date: Tue, 29 Nov 2005 18:52:18 +0100
Message-ID: <20051129175217.GG31333@svana.org> (raw)
In-Reply-To: <438C8FD9.3090302@boreham.org>
References: <Pine.LNX.4.58.0511282217470.13586@josh.db>
<Pine.LNX.4.58.0511291429330.18112@linuxworld.com.au>
<20051129110214.GA31333@svana.org>
<438C76DA.4060801@boreham.org>
<20051129164651.GF31333@svana.org>
<438C8FD9.3090302@boreham.org>
On Tue, Nov 29, 2005 at 10:28:57AM -0700, David Boreham wrote:
> Actually, after reading up on the current state of things, I'm not sure you
> can even get POSIX aio on top of kernel aio in Linux. There are also a
> few limitations in the 2.6 aio implementation that might prove troublesome:
> for example it only works with O_DIRECT.
Which is bizarre because it's semantically equivalent to having a
seperate thread doing the read() and sending you a signal when it's
done. What I'm thinking of testing is a join across two large table so
there is actually more than one outstanding request at a time. But it's
irritating to have to code to a special api...
Have a nice day,
--
Martijn van Oosterhout <kleptog@svana.org> http://svana.org/kleptog/> Patent. n. Genius is 5% inspiration and 95% perspiration. A patent is a
> tool for doing 5% of the work and then sitting around waiting for someone
> else to do the other 95% so you can sue them.
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To: pgsql-hackers@postgresql.org
Cc: kleptog@svana.org, david_list@boreham.org
Subject: Re: ice-broker scan thread
In-Reply-To: <20051129175217.GG31333@svana.org>
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