Messages in this thread | | | Date | Wed, 10 Sep 2008 19:34:42 +0200 | From | Ingo Molnar <> | Subject | Re: 2.6.27-rc5 OLTP performance regression |
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* Ma, Chinang <chinang.ma@intel.com> wrote:
> I increased the /proc/sys/kernel/sched_shares_ratelimit from 1 > millisecond to one second to reduce the frequency of shares update. > That was okay for OLTP workload. As Peter mentioned, a larger value > will reduce the accuracy of SMP fairness for group scheduler and the > ratelimit and using a larger default value may not be good for general > case.
does 10 msecs already get you most of the 2%? 1000 millisecond sounds very (and probably unacceptable) coarse.
Ingo
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