| From: | Martijn van Oosterhout <kleptog(at)svana(dot)org> |
|---|---|
| To: | Mark Kirkwood <markir(at)paradise(dot)net(dot)nz> |
| Cc: | NikhilS <nikkhils(at)gmail(dot)com>, Luke Lonergan <llonergan(at)greenplum(dot)com>, Raja Agrawal <raja(dot)agrawal(at)gmail(dot)com>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: Asynchronous I/O Support |
| Date: | 2006-10-18 12:17:54 |
| Message-ID: | 20061018121754.GA11184@svana.org |
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| Lists: | pgsql-hackers |
On Wed, Oct 18, 2006 at 08:04:29PM +1300, Mark Kirkwood wrote:
> >"bgwriter doing aysncronous I/O for the dirty buffers that it is
> >supposed to sync"
> >Another decent use-case?
Good idea, but async i/o is generally poorly supported.
> Is it worth considering using readv(2) instead?
Err, readv allows you to split a single consecutive read into multiple
buffers. Doesn't help at all for reads on widely areas of a file.
Have a ncie day,
--
Martijn van Oosterhout <kleptog(at)svana(dot)org> http://svana.org/kleptog/
> From each according to his ability. To each according to his ability to litigate.
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