Maxuproc parameter and number of processes Post: 303033181

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Operating Systems AIX Maxuproc parameter and number of processes Post 303033181 by Don Cragun on Monday 1st of April 2019 07:09:05 AM

04-01-2019

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If you are hitting a limit on the number of processes you're running, ps may be exempt from the limit because it usually runs set-UID root.

If you're running ps -ef | grep "<username>" or some other pipeline, even though ps might be exempt from the limit, the pipeline is not exempt and the output you're seeing could be truncated if the grep is killed due to the process limit.

Are you seeing this problem consistently? Or does it vary with time of day, or at times when cron or at jobs might be expected to be running? You say you're seeing about 90 processes running. Are they all things that you expect to be running? Are any of them things that hang around running for a while and then kick off a bunch of other processes to perform certain tasks when certain conditions arise?

Could network traffic be kicking off jobs that are being run by processes running under your account?

Do you have a bunch of MQ monitoring scripts running in the background? What are they doing? How many of them are there?

Obviously, with no access to your system, we can only make wild guesses. I agree that it sounds like you're running enough processes that AIX isn't letting you start any more until one or more of the jobs that are running terminate, but that doesn't help much if we don't know what is running and why it is running.

Is process accounting enabled on your system? Can you sysadmin help you track down what jobs you're running during times when your processes are being killed?

Don Cragun

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LEARN ABOUT DEBIAN

hwloc-ps

HWLOC-PS(1)							       hwloc							       HWLOC-PS(1)

NAME

       hwloc-ps - List currently-running processes that are bound.

SYNOPSIS

       hwloc-ps [options]

OPTIONS

       -a	 list all processes, even those that are not bound to any specific part of the machine.

       -p --physical
		 report OS/physical indexes instead of logical indexes

       -l --logical
		 report logical indexes instead of physical/OS indexes (default)

       -c --cpuset
		 show process bindings as cpusets instead of objects.

       --whole-system
		 Do not consider administration limitations.

DESCRIPTION

       By  default,  hwloc-ps  lists  only  those currently-running processes that are bound; it displays their their identifier, command-line and
       binding.  The binding may be reported as objects or cpusets.  By default, process bindings are restricted to the currently available topol-
       ogy.  If  some  processes  are bound to processors that are not available to the current process, they are ignored unless --whole-system is
       given.  The output is a plain list. If you wish to annotate the hierarchical topology with processes so as to see how they are actual  dis-
       tributed on the machine, you might want to use lstopo --ps instead (which also only shows processes that are bound).

       The -a switch can be used to show all processes, if desired.

SEE ALSO

       hwloc(7), lstopo(1), hwloc-calc(1), hwloc-distrib(1)

1.4.1								   Feb 27, 2012 						       HWLOC-PS(1)

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