Sometimes glance (performance monitor for HP-UX) can crash (before crash, it will return 0% of CPU, Disk and networking) working with the following error:
GlancePlus fatal error.
== Fatal Nums Error == C.04.50.57 02/10/07 ==
User: root/6pts/6(/dev/pts/6) Date: Sun Dec 6 15:52:12
File: /crm/numsVob/hp/11.0/nums.C Line: 485 Product id: Glance
System: server B.11.11 9000/800
Errno: 0 (Error 0)
Connection to midaemon lost -- check midaemon process and status.mi == End of Error Msg
=============================

To solve it, you should:

Stop MWA:
# mwa stop

Remove all files (including the hidden ones) from /var/opt/perf/datafiles:
# rm -rf /var/opt/perf/datafiles/* rm -rf /var/opt/perf/datafiles/.*

Check if midaemon and ttd are stopped:
# mwa status

If midaemon and ttd didn’t stop, force stops them with the command kill (the PID was returned by the command ‘mwa status’).

Now, start MWA again:
# mwa start