I believe that the standard mechanisms for launching OSDs already sets
the thread cache higher than default. It's possible we might be able to
relax that now as async messenger doesn't thrash the cache as badly as
simple messenger did. I suspect there's probably still some value to
increasing it over default though for SSDs.
Mark
On 07/19/2018 01:35 PM, Gregory Farnum wrote:
I don't think that's a default recommendation — Ceph is doing more
configuration of tcmalloc these days, tcmalloc has resolved a lot of
bugs, and that was only ever a thing that mattered for SSD-backed OSDs
anyway.
-Greg
On Thu, Jul 19, 2018 at 5:50 AM Robert Stanford
<rstanford8896@xxxxxxxxx <mailto:rstanford8896@xxxxxxxxx>> wrote:
It seems that the Ceph community no longer recommends changing to
jemalloc. However this also recommends to do what's in this
email's subject:
https://ceph.com/geen-categorie/the-ceph-and-tcmalloc-performance-story/
Is it still recommended to increase the tcmalloc thread cache
bytes, or is that recommendation old and no longer applicable?
Thanks
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