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Re: Introducing a new linux readahead framework

From: Michael Stone <mstone+postgres(at)mathom(dot)us>
To: pgsql-performance(at)postgresql(dot)org, Wu Fengguang <wfg(at)mail(dot)ustc(dot)edu(dot)cn>
Subject: Re: Introducing a new linux readahead framework
Date: 2006-04-27 11:43:42
Message-ID: 20060427114340.GE31328@mathom.us (view raw or flat)
Thread:
Lists: pgsql-performance
On Wed, Apr 26, 2006 at 10:43:48AM -0400, Michael Stone wrote:
>patch a 512k blocksize would get ~100MB/s. I'm now watching to see how 
>it does over a couple of days on real-world workloads. 

I've got one DB where the VACUUM ANALYZE generally takes 11M-12M ms;
with the patch the job took 1.7M ms. Another VACUUM that normally takes 
between 300k-500k ms took 150k. Definately a promising addition.

Mike Stone


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