Re: [Users] Custom settings for Kernel Same-page Merging (KSM)?
Hi Frank,
we do not currently have anything in the engine that would allow you to do this. If you
create an oVirt RFE bug for it it would make it easier for us to add the feature and track
the progress.
However you can update the policy file you found to accomplish this. Just set (defvar
ksm_sleep_ms_baseline 10) to a higher value and do not forget to properly restart VDSM
when you do.
Regards
--
Martin Sivák
msivak(a)redhat.com
Red Hat Czech
RHEV-M SLA / Brno, CZ
----- Original Message -----
Hi,
recently I've noticed that ksmd is using quite a lot CPU on
my oVirt node. While I have plenty RAM, my CPU is way slow.
Thus ksmd is eating up the most limited ressource here.
Is it supported to use custom settings for ksmd? I've noticed
that it is handled by MoM: /etc/vdsm/mom.d/03-ksm.policy.
May I just change some settings here, or is there a tuning
parameter in oVirt engine? Couldn't find a matching one
with engine-config.
I'd like to use a higher value for sleep_millisecs to reduce
CPU usage (with the possible side effect of higher RAM usage).
Thanks
- Frank
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