Description of problem:
I'm running the upstream Ceph packages which link against tcmalloc.
On my cluster, perf top shows a high amount of cpu spent in tcmalloc.
This can be alleviated by exporting TCMALLOC_MAX_TOTAL_THREAD_CACHE_BYTES, but this only works with newer versions of gperftools.
The upstream bug is at https://code.google.com/p/gperftools/issues/detail?id=585
More info about this in https://bugs.launchpad.net/ubuntu/+source/google-perftools/+bug/1439277 and http://t55978.file-systems-ceph-development.file-systemstalk.info/tcmalloc-issue-t55978.html
Can you please upgrade gperftools in epel7 to at least 2.1.90?
Version-Release number of selected component (if applicable):
gperftools-2.4-5.el7 has been submitted as an update to Fedora EPEL 7. https://bugzilla.redhat.com/show_bug.cgi?id=1238982
gperftools-2.4-5.el7 has been pushed to the Fedora EPEL 7 testing repository. If problems still persist, please make note of it in this bug report.\nIf you want to test the update, you can install it with \n su -c 'yum --enablerepo=updates-testing update gperftools'. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2015-7767
gperftools-2.4-5.el7 has been pushed to the Fedora EPEL 7 stable repository. If problems still persist, please make note of it in this bug report.