[Bug 1588520] [NEW] Set tcmalloc thread cache size

[Peter Sabaini]

Public bug reported:

We currently leave the tcmalloc thread cache size on the default
setting, 32M. As per https://github.com/ceph/ceph/pull/7934
TCMALLOC_MAX_TOTAL_THREAD_CACHE_BYTES probably should be set to 128M by
default

Currently there's also no good way to config this because of Bug
#1587516

** Affects: ceph (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: canonical-bootstack

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https://bugs.launchpad.net/bugs/1588520

Title:
  Set tcmalloc thread cache size

Status in ceph package in Ubuntu:
  New

Bug description:
  We currently leave the tcmalloc thread cache size on the default
  setting, 32M. As per https://github.com/ceph/ceph/pull/7934
  TCMALLOC_MAX_TOTAL_THREAD_CACHE_BYTES probably should be set to 128M
  by default

  Currently there's also no good way to config this because of Bug
  #1587516

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