We have been experiencing sporatic high utilization with out servers that
provide GroupWise WebAccess. I found a post that suggested watching under
the profile/debug section of NoRM to try to pin down what happens when it
spikes. It appears that the "Nearest Symbol" that takes up 90 - 100
percent is NSS.NLM | MSG_NEXTDOOR. When I select that it comes up with a
nearest symbol (NWSA.NSS | ZH_VCStnfiles+14F). Once the high utilization
starts the only way to resolve the issue is to reboot the server. Our
server configuration is as follows:

Proliane DL360
NetWare 6.5 sp4 (I have to point out that I had a temporary server in it's
place that had sp5 and got the same results)