On Tue, Nov 24, 2009 at 06:43:42PM +0530, kashyap chamarthy wrote: > On 11/24/2009 05:31 PM, Gianluca Cecchi wrote: > >On Tue, Nov 24, 2009 at 12:50 PM, Dan Kenigsberg<[email protected]> wrote: > >> > >>yes, the purpose of ksmtuned is to tune ksm parameters, or stop it > >>altogether if it is not needed. In case your two virtual machines > >>required less than available memeory, ksm is not used. If ksmtune senses > >>that memory stress has risen, it fires up ksm again. > >> > >>I don't think this is written anywhere but in the code.. We probably > >>should add something to the "User experience" section to that feature page. > >>How about: > >> > >>Fedora's kvm comes with 2 services controlling the behavior of ksm. One, > >>simply called ksm, is just a nice means to start and stop ksm's kernel > >>thread. The other, called ksmtuned, controls the first service and tunes > >>its parameters according to the memory stress that is generated by KVM > >>virtual machines. > >> > > > >It sounds good; I would only add something like this: > > > >"In case of need, e.g. in minor load situations, ksmtuned can also > >stop ksm service at all. > >Later, if ksmtuned senses that memory stress has risen, it will fire > >up ksm again." > > > >So that one knows that to monitor the status of ksm is not a good idea > >in general..... > >Any log configurable to see/trace ksmtuned decisions (start ksm, stop > >ksm, increase pages...)? > > yes, configuratble log/trace info for ksm/ksmtuned would be useful. > > I see this for configuration stuff - /etc/ksmtuned.conf > > /kashyap
You'd have to apply the following patch to /usr/sbin/ksmtuned for it to easily log into /var/log/ksmtuned. You'd have to add two lines to /etc/ksmtuned.conf for this to actually work. Regards, Dan. _______________________________________________ Fedora-virt mailing list [email protected] https://www.redhat.com/mailman/listinfo/fedora-virt
