Hello, Looking at perf top it looks as though Ceph is spending most of it's CPU cycles on tcmalloc. Looking around online i found that this is a known issue and in fact I found this guide on how to increase the tcmalloc thread cache size: https://swamireddy.wordpress.com/2017/01/27/increase-tcmalloc-thread-cache-bytes/. Is this the right step to take toward fixing this issue?
Here's the output of perf report that shows this behavior. http://paste.openstack.org/show/629490/ Thanks, John
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