Messages in this thread | | | Date | Fri, 7 Jul 2000 20:31:47 -0400 (EDT) | From | Derek Martin <> | Subject | RE: Why so must idle time ? |
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Today, Giuliano Pochini gleaned this insight:
> > >> I have a machine running web server. It has a lot of httpd's loaded and > >> most of them are sleeping. The load average is always around 7-13, so I > >> wonder why the CPU usage doesn't reach ~100%. It wastes CPU time or > >> simply there is something top does not show ? > > > > Two words, "disk I/O". > > Which is very low. I have 384MB and disk i/o is below 1MB/s most of time with > little seeking. Anyway during disk I/O the task is sleeping, not ready, and CPU > should be given to another task.
They could also be waiting on I/O from the network...
-- --------------------------------------------------------------- Derek D. Martin | Unix/Linux Geek ddm@MissionCriticalLinux.com | derek@cerberus.ne.mediaone.net ---------------------------------------------------------------
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