Messages in this thread |  | | | Date | Thu, 20 May 2010 23:18:03 -0700 (PDT) | | Subject | Re: RFC: dirty_ratio back to 40% | | From | David Miller <> |
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From: Larry Woodman <lwoodman@redhat.com> Date: Thu, 20 May 2010 07:20:42 -0400
> Increasing the dirty_ratio to 40% will regain the performance loss > seen in several benchmarks. Whats everyone think about this???
I've been making this change via sysctl on every single system I have, and have been doing so for quite some time.
When doing a lot of GIT operations to a non-SSD disk the kernel simply can't submit the writes early enough to prevent everything getting backlogged, and then processes pile up being forced to sleep on I/O for several seconds at a time.
I therefore totally support making this the default, but I know some people will be against it :-)
Acked-by: David S. Miller <davem@davemloft.net>
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