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Re: High CPU load when 'free -m' shows low 'free' memory even though large 'cached' memory still available - Mailing list pgsql-performance

From Tom Lane
Subject Re: High CPU load when 'free -m' shows low 'free' memory even though large 'cached' memory still available
Date
Msg-id 6015.1401976057@sss.pgh.pa.us
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In response to High CPU load when 'free -m' shows low 'free' memory even though large 'cached' memory still available  (Vince Lasmarias <vincent.lasmarias@gmail.com>)
Responses Re: High CPU load when 'free -m' shows low 'free' memory even though large 'cached' memory still available
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Vince Lasmarias <vincent.lasmarias@gmail.com> writes:
> For the past few days, we've been seeing unexpected high CPU spikes in our
> system.

Recent reports have suggested that disabling transparent huge page
management in your kernel can help with this.  If the excess CPU
load is mostly "system" time not "user" time then this is probably
the culprit.

            regards, tom lane

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