cpghost wrote: > On Wed, Jan 30, 2008 at 02:55:30PM +0200, Stefan Lambrev wrote: >> Greetings, >> >> I want to know what is the bad effect of increasing HZ too much? >> And when is too much? What problems can I expect when HZ>2000? >> Can I change this value without pre-compiling the kernel? > > You can change HZ by adding a line to /boot/loader.conf like this: > > kern.hz="100" > > (it works on RELENG_6 and RELENG_7 and I'm using this conservative > setting on all my boxes, since I don't need faster context switching) > > If you set HZ too high, the kernel will spend too much overhead > on unnecessary context switching, and it may even reach a point > (with very high values of HZ) where interrupt service routines > get interrupted way too often by clock ticks; i.e. interrupts > would eventually come in faster than the kernel can service them.
Isn't there also something bad about TCP timestamp overflow? _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[EMAIL PROTECTED]"