[CentOS] What is eating up Swap
jdmls at yahoo.com
Mon Dec 16 15:40:32 UTC 2013
From: Stephen Harris <lists at spuddy.org>
> Having pages in swap is not indicative of a problem; what's more
> important is the level of swap _activity_. See "vmstat" output, for
> example, to determine how much swap activity is occuring. If that's
> zero then you're not throwing new pages out to swap.
Maybe unrelated but we ran into some NUMA memory allocation per cpu
problem with our mysql servers.
The swap would be used (up to 100%) while there was plenty of free RAM.
Prefixing mysqld with "numactl --interleave all" seemed to fix it...
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