On 2004-10-04 06:15, Joe Schmoe <[EMAIL PROTECTED]> wrote: > > I have a FreeBSD system (4.9) running a fair number of processes in a > multi-user / shell hosting environment. > > One problem that routinely comes up is that the system will seem to be > fine in terms of CPU, and none of the top 10 or 15 processes that I > see in "top" are using much CPU ... but the load average is very high > - sometimes as high as 30 or 40 ... > > I have good reason to suspect that the load is high due to I/O. I can > see the number of processes blocking on I/O in vmstat, and I can see > iostat for the entire machine, of course ...
You might want to see if the "io" mode of top can be ported to RELENG_4. In 5.X you can use top to display io statistics too: : $ top -m io | sed -e 1,7d | head -10 : PID USERNAME VCSW IVCSW READ WRITE FAULT TOTAL PERCENT COMMAND : 1742 keramida 32250 2182 278 7 1376 1661 28.90% Xorg : 1829 keramida 5617 1601 440 4 472 916 15.94% mozilla-bin : 416 root 5031 5119 0 0 1 1 0.02% moused : 1745 keramida 19871 517 65 0 22 87 1.51% wmaker : 1789 keramida 5264 425 2 0 1 3 0.05% xterm-static : 1837 keramida 643 205 17 188 6 211 3.67% mutt : 1792 keramida 2640 1023 0 0 0 0 0.00% screen : 1949 keramida 260 118 0 16 1 17 0.30% emacs : 293 root 702 181 9 3 0 12 0.21% syslogd The differences of top from RELENG_4 to CURRENT are many and I don't have the time right now to try porting the "io mode" stuff to RELENG_4, but if you cannot do it yourself I might find a bit of time this weekend. - Giorgos _______________________________________________ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
