07-26-2002 06:05 AM
I realize we can't live our lives watching Glance, but I need to give my staff a tool to watch for runaway jobs, excessive processes run by users, etc.
07-26-2002 08:23 AM
A process that takes all of the CPU is not necessarily a problem-- if no other process is asking for CPU, then the system will allow one process to use all of the available resources.
If there are active sessions (processes) in the CQ and a batch job in the DQ, then the system will first attend to the CQ processes, and if there is any CPU-time left, the lower queues' processes may get some CPU time. If there are no processes above it that ask for CPU, then even a batch job in the lowest queue can take 100% of the CPU (if the job has enough work for the CPU to do...). "System hogs" must be defined as a process in the same or higher-priority queue taking lots of CPU-time when another process is waiting for CPU. Often this can be resolved quickly-- just altproc that process to a lower priority...
A system with 4 processors can show a total CPU usage percentage (in the detail lines on the "Global" screen) of up to 400%.
07-26-2002 08:51 AM
Additionally, if you have only one job running and it is taking 99% of one of the CPU's that is all you are going to get. A single process cannot span multiple CPU's so they will remain idle. So, you will never see one process with 200% CPU usage for example.
07-28-2002 11:46 PM
Patch GLALXX8 or later fixed this.
07-29-2002 06:51 AM
Without the patch mentioned, you are probably seeing the utilization of just one CPU. My guess is that you'll see numerous processes and they add up to way over 100% in the
cpu column. This was pointed
out last year in my paper and presentation at HPWorld as one
of Glance/iX weaknesses. If you'd like a copy of both, email me at the address below.
For this particular screen, individual cpu utilization, I
prefer SOS from Lund Performance Solutions. Lund also has a similiar product for HP-UX.
My $.04 for inflation