linux-kernel - Re: RFC: dirty

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Message-ID: <20100520122919.GA3420@fancy-poultry.org>
Date:	Thu, 20 May 2010 14:29:19 +0200
From:	Heinz Diehl <htd@...cy-poultry.org>
To:	linux-kernel@...r.kernel.org
Cc:	linux-mm <linux-mm@...ck.org>
Subject: Re: RFC: dirty_ratio back to 40%

On 20.05.2010, Larry Woodman wrote: 

> Increasing the dirty_ratio to 40% will regain the performance loss seen
> in several benchmarks.  Whats everyone think about this???

These are tuneable via sysctl. What I have in my /etc/sysctl.conf is

 vm.dirty_ratio = 4
 vm.dirty_background_ratio = 2
 
This writes back the data more often and frequently, thus preventing the
system from long stalls. 

Works at least for me. AMD Quadcore, 8 GB RAM.

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