here some tips I use to improve librbd performance && qemu:
- disabling cephx auth
- disable debug_ms : (I'm jumping from 30k iops to 45k iops, with 4k randread)
[global]
debug ms = 0/0
- compile qemu with jemalloc (--enable-jemalloc)
https://lists.gnu.org/archive/html/qemu-devel/2015-06/msg0
Hi Igor and David,
Thanks for your replies. There are no ceph-mds processes running in our
cluster.
I'm guesing David's reply applies to us, and we just need to setup
additional monitoring for memory usage, so we get notified in case it
happens again.
Anyway: we learned that this can happe
