> On Wed, Jan 09, 2002 at 11:55:21PM -0800, Brian Pane wrote: > > My hypothesis upon seeing these numbers is that the high run queue length > > is due to us hitting some bottleneck in the kernel on daedalus--and because > > post-2.0.28 releases waste less time in usr-space code between syscalls, > > they hit that kernel bottleneck a lot harder than 2.0.28 did.
An interesting theory. But it doesn't explain the high numbers of CPU ticks I've recorded for trivial requests, nor does it explain the top Brian B sent us with two httpd's both using over 50% of the CPU for a while Justin Erenkrantz wrote: > FWIW, Aaron was telling me that he remembers seeing high run-queue > lengths on machines with failing hard drives. OK, but daedalus uses the same hard drives under 2_0_28. Greg
