ps command and %CPU

[OLIVA_1]

Hello,

I would like monitoring some proceses and I need to know the %CPU used.
With Solaris I can used the ps -aux command but it doesn't display %CPU field on HP-UX...

Someone can help me ?

Thanks,

[OLIVA_1]

# /usr/ucb/ps -aux | more
USER PID %CPU %MEM SZ RSS TT S START TIME COMMAND
root 1617 2.1 22.8926424916624 ? S Jan 26 1949:14 /opt/eh55/bin/sys/
root 5252 0.1 0.1 1816 1344 pts/1 O 13:30:28 0:00 /usr/ucb/ps -aux
root 3 0.1 0.0 0 0 ? S Jan 26 15:20 fsflush
eh 1618 0.1 2.310068892960 ? S Jan 26 12:15 /opt/eh55/bin/sys/
root 463 0.0 0.312944 8992 ? S Jan 26 5:50 /opt/VRTSvmsa/jre/
root 2841 0.0 0.1 5840 2336 ? S 13:08:40 0:00 /usr/local/sbin/ss
root 5251 0.0 0.1 1248 992 pts/1 S 13:30:28 0:00 more
root 0 0.0 0.0 0 0 ? T Jan 26 0:00 sched
root 1 0.0 0.0 888 368 ? S Jan 26 2:26 /etc/init -


I would like the field %CPU

Thanks

[Stephen Keane]

Use top instead.

[john korterman]

Hi,
the top command in hpux can tell you the % usage of a process.
regards,
John K.

[OLIVA_1]

I know top command displays %CPU... but I need a command which could be used in a shell script. Indeed I need to follow a process for a week.

[john korterman · Accepted solution]

Hi again,
then try customizing, e.g.:
# UNIX95= ps -eo comm -o pcpu

notice the space before the ps comand. Consult the man page for ps.

regards,
John K.

[OLIVA_1]

Thanks John !!!

It works properly.
Could you please explain me what does ti mean "UNIX95=" ?

And what I have some results up to 100%... for instanca I have a process which used 201.5 % of CPU ?

Thanks.

[Kent Ostby]

Oliva --

I use the following:

ps -ef | cut -c42-80 | sort -nr | head

This will list the top 10 processes by CPU from the PS command.

I'll use it a few times in a row to see what's eating the CPU right now.

[Keith Bryson]

Hi Oliva

You will have more than 100% CPU depending on how many CPUs you have. If you have 8 CPUs, you can run up to 800%.

The UNIX95 variable is set to enable XPG4 compatibility with certain commands. See 'man ps' for more information

Keith

[john korterman]

Hi,
In this case, when UNIX95 is not set, the ps command behaves in hpux as laid down for hpux.
Setting UNIX95 means using standard features of various unix flavours enabled by a group of persons referred to as the Xopen Posix Group. This means changing the whole behaviour of the ps command, gaining access to non-hp standard features.
However, setting UNIX95 may influence other commands then just ps, so I would recommend that you execute it only as specified with the space after the equal sign - if not, it is difficult to describe the influence on other commands.
I am sorry to say that I cannot explain why some commands use 200% cpu: is it a multiprocessor system where commands may take resources from more than a single cpu?
Perhaps others har better explanations.

regards,
John K.