Red Hat Bugzilla – Bug 1301229
[doc] TCmalloc 2.4 tunable thread cache size
Last modified: 2016-03-01 03:23:07 EST
Description of problem:
RHCS 1.3.2 runs on RHEL 7.2's TCmalloc (version 2.4) which allows tuning of the thread cache.
We need to document
1. What the default is (128MB)
2. That it changed from previous releases, where it was 32MB
3. How to change the thread cache size from ceph.conf. Sage wrote a patch to take care of this, bug 1297502 tracks that RFE.
This is one of two late-breaking doc bugs. Anjana has been informed.
Please note that the config file to change is:
This bug is not seen in ubuntu. I have checked in "/etc/default/ceph" of Jan 26th 2016 build and the value is TCMALLOC_MAX_TOTAL_THREAD_CACHE_BYTES=128MB in all the osds. However the bug has been verified by Rachana in RHEL. So moving it to Verified stage.