CPU bottle-neck

[Noel Daniel]

On a HP-UX 11i system being reported slow, & gpm being run to chk. status of system, it was identified that a CPU bottle neck has occured. On further observation it was noted that a process titled "native_thread" is running many instances & using clogging up resources. Chk. attachement of a glancer page for further clarification. Has anyone experienced a similar issue before ? Any remedies adviced ?

[Yogeeraj_1]

hi Noel,

if you post more information, maybe you may get better responses here.

e.g. ps -ef|grep

where pid corresponds to one of the top "native_thread" processes.

You may also further drill down into the process in glance plus.

lastly, what version of jdk are your using?

java -fullversion

Also, what are the latest patches installed on your system?


good luck!

kind regards
yogeeraj

[Steven E. Protter]

Shalom,

It's probably an application problem.

http://www.hpux.ws/system.perf.sh
For more exact measurement.

General ideas:
1) Does the system have a recent bi-annual patch set installed.
2) Check with the application vendor.

It would be helpful to know what the system is supposed to do. Oracle server, something like that.

SEP

[Hein van den Heuvel]

Those Top processes are all Java thingies.

The 'CPU bottle neck' is an effect, not the cause.

The cause is likely to be insufficient memory, or if you like an other way to put it, an overloaded memory and swap usage.

The CPU time is mostly in SYSTEM mode, in a failing attempt to try to squeeze everyting needed in memory.. but it does not fit.

Did it used to work fine?
Has the system been deteriorating? Increased load? Any recent changes?
Recent tuning?
Maybe the Oracle SGA size was tuned to high?

Please consider this older reference:

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=30169


Hope this helps some,
Hein van den Heuvel (at gmail dot com)
HvdH Performance Consulting