I upgraded the motherboard to a 933 MHz PIII, same ram and disk arrangement, Problem went away... Seems a PII 450 can't cut it on Centos 4.2.... but it is an old machine anyway... P. Bryan J. Smith wrote: >Peter Farrow <peter at farrows.org> wrote: > > >>web browsing now has a high latency ... DNS is all ok ... >>I note that squid uses a fair amout of CPU on the PII450 >>from time to time, but can't seem to get a handle on what >> >> >is > > >>causing the delay. >> >> > >Could be differences in the disk / disk controller. Squid is >very storage intensive, although 512MiB RAM should mitigate >much of that. > >Run "hdparm -i" and "hdparm" (no options) on each of your IDE >disks and check for DMA settings, and what the controller >currently set at (the asterisk next to the modes). > > > > >