kern.hz = 10
mister.olli at googlemail.com
Fri Jan 30 04:53:26 PST 2009
> Due to bad performance of high HZ in VMs, in 8-CURRENT it is
> explicitly reduced to 10 if the kernel is running under any kind of
> virtual environment. This is a somewhat theoretical number and
> probably needs tuning.
Oh I didn't knew that. *SORRY*
> If you're interested in trying it out, you can increase it by adding
> "kern.hz=xxx" to /boot/loader.conf and seeing what is the actual
> performance influence of high HZ under Xen.
I've run on 100HZ quite some time now and did have the impression that
8-CURRENT is slow. It's even faster on copy processes as 7 under VMware
on a host machine which is 3 years younger...
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