One of my inn 1.4unoff4 news reader servers started throttling
itself just today with "Interrupted system call writing article file"
(happened twice in the past 24 hours). The spool is on an F230
running 4.0.3, 256MB of read cache and 4MB of write cache. The news
server is an Ultra 170, 512MB of RAM, ~250 to 300 readers around peak
times. The two are on a FDDI ring.
The F230 hovers around 65% CPU usage, so I don't think that's the
problem, but the Ultra is reporting 900 to 1200 packets per second
both in and out of its FDDI interface. Half of its time is spent in
the kernel, according to top(1). The mounts are NFSv3 over UDP.
Would dropping back down to NFSv2 help any? I'm trying to determine
if this is a network congestion problem, or an OS limitation (on
either the Netapp or the Sun).
--
Brian Tao (BT300, taob(a)netcom.ca)
"Though this be madness, yet there is method in't"