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Re: Introducing a new linux readahead framework

From: "Jim C(dot) Nasby" <jnasby(at)pervasive(dot)com>
To: Wu Fengguang <wfg(at)mail(dot)ustc(dot)edu(dot)cn>,Markus Schaber <schabi(at)logix-tt(dot)com>,pgsql-performance(at)postgresql(dot)org
Subject: Re: Introducing a new linux readahead framework
Date: 2006-04-21 18:34:24
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-performance
On Fri, Apr 21, 2006 at 08:20:28PM +0800, Wu Fengguang wrote:
> Hi Markus,
> On Fri, Apr 21, 2006 at 09:53:34AM +0200, Markus Schaber wrote:
> > Are there any rough estimates when this will get into mainline kernel
> > (if you intend to submit)?
> I'm not quite sure :)
> The patch itself has been pretty stable.  To get it accepted, we must
> back it by good benchmarking results for some important applications.
> I have confirmed that file service via FTP/HTTP/NFS can more or less
> benefit from it. However, database services have not been touched yet.
> Oracle/DB2 seem to bypass the readahead code route, while postgresql
> relies totally on kernel readahead logic. So if postgresql is proved
> to work well with this patch, it will have good opportunity to go into
> mainline :)

IIRC Mark from OSDL said he'd try testing this when he gets a chance,
but you could also try running dbt2 and dbt3 against it.
Jim C. Nasby, Sr. Engineering Consultant      jnasby(at)pervasive(dot)com
Pervasive Software    work: 512-231-6117
vcard:       cell: 512-569-9461

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