As mentioned before, IO could give such strange results. I suggest launching Thanks, much appreciated! This has yielded some interesting data, which I'll attempt to include a few seconds before and after one of these events occurred. system interrupts per second: Note the ~200x jump to almost 200,000 interrupts per second. 2907 6714 1371 194218 2456 2907 network received: Note the network received ramps up over 5 seconds, peaks at ~50x background, and ramps back down in about 3 seconds. The peak is from the same sample as the 200x sample above. 108784 389794 1070850 4843956 352226 353102 96392 Everything else looks sane -- there's enough ram, nothing's being swapped out, etc. This is on a private-network server that has a load balancer in front of it, so if it's network related, it wouldn't be misdirected random bits. Has anyone seen this sort of behavior before? What was the cause? What should I do to figure out how to keep the load averages from flipping out of control? (This isn't something as lame as a counter rolling over somewhere internal to the kernel, is it? Wouldn't think so, but thought to ask. Running 2.6.18-8.1.8.el5. We could reboot to run 2.6.18-8.1.15 if that'd be a potential fix.) Thanks for any insight! best, Jeff
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