pagezero again
Chuck Swiger
cswiger at mac.com
Fri May 12 15:14:18 PDT 2006
Ivan Voras wrote:
> Some time ago I reported that pagezero kernel thread sometime takes
> (what seems to me) a too large chunk of available CPU (30%) on a very
> busy web server. There were no replies :( Since then, I've
> reconfigured apache to use PHP as a fastcgi module and the problem
> seems to have gotten worse - now it *always* takes ~25-30% CPU, and my
> "System" time stat shows it (its almost always ~30%).
>
> From what I can understand, pagezero thread fills kernel's pool of
> zeroed pages. This looks non-threteaning, but what would cause such
> high demand of zeroed pages on my system?
Generally, a whole bunch of processes that are demanding a lot or memory
and/or swapping would do it.
What does "vmstat 1" look like...?
--
-Chuck
More information about the freebsd-stable
mailing list