Maxuproc parameter and number of processes Post: 303033181

Sponsored Content

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

Registered User

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

View Public Profile for Don Cragun

Find all posts by Don Cragun

10 More Discussions You Might Find Interesting

1. Solaris

How to find number of processes ?

Hi , I need to count all processes contains the pattren "FND" For Example: I was reteriving the details of all processes related to "FND" by this command $ ps -ef | grep FND but now I just wanna count them . Regards Adel

2. UNIX for Dummies Questions & Answers

checking if parameter passed is a number

I have written a function that fills an array and another function where if a parameter is supplied it will jump to that part of the array and cat it to the screen. I need to put in some checks to make sure the parameter supplied is firstly a number and then not a number great than the length of...

3. Programming

How to limit the number of child processes

I need a mechanism to fork child processes and all child processes should connect to a server.but the number of child processes should be limited(for ex:50) Here's my pseudo, but I cant figure out how to limit the child process number. Should I use a semaphore? or what? for(;;)...

4. Shell Programming and Scripting

Dynamic number of parameter

Hi all Is there away to create a script with dynamic number of parameter.. like the kill command in UNIX kill -9 xxx xxx cheers

5. Shell Programming and Scripting

How to Control Number of Processes Running

Hi Is there a way to count how many processes a script has started, count how many of these have finished, and make the script wait if their difference goes over a given threshold? I am using a script to repeatedly execute a code (~100x) which converts 2 data files into one .plt which is in...

6. Shell Programming and Scripting

Check parameter is number or string

Hey I'm new in linux, I'm looking for a code to check whether the parameter is a number or a string. I have already tried this code: eerste=$(echo $1 | grep "^*$">aux) if But it doesn't work.:confused: Thanks

7. AIX

Maximum number of processes kernel parameter

Hi, Is there a maximum number of processes kernel parameter in AIX. Solaris has max_nprocs, HP-UX has nproc, I can only find max user process (maxuproc) for AIX. Thanks, Wilson.

8. AIX

Maxuproc vs ulimit -u [processes(per user)]

Morning, Somebody can tell me in AIX 6.1 what is the different between the maxuproc (lsattr -El sys0 | grep max) and the for a user. Example: Oracle is limited by : #ulimit -u processes(per user) unlimited But lsattr -El sys0| grep maxuproc show me : maxuproc 16384 So...

9. UNIX for Dummies Questions & Answers

Maxuproc and limit

// AIX 6.1 & Power 7 server I have maxuproc set to 16384. lsattr -El sys0 -a maxuproc maxuproc 16384 Maximum number of PROCESSES allowed per user True What is the maximum number of maxuproc we can go for? If I increase maxuproc to the higher number, what would be ramifications? I...

10. Red Hat

Increase maxuproc value

Hi Guys, I am running RHEL6 and now my processes reach maximum limit. How do I increase the maxuproc value? Can I increase the value without rebooting the server? Thanks in advance... Please Help!!!

LEARN ABOUT DEBIAN

queuedefs

queuedefs(4)							   File Formats 						      queuedefs(4)

NAME

       queuedefs - queue description file for at, batch, and cron

SYNOPSIS

       /etc/cron.d/queuedefs

DESCRIPTION

       The queuedefs file describes the characteristics of the queues managed by cron(1M). Each non-comment line in this file describes one queue.
       The format of the lines are as follows:

	      q.[njobj][nicen][nwaitw]

       The fields in this line are:

       q	The name of the queue. a is the default queue for jobs started by at(1); b is the default queue for jobs  started  by  batch  (see
		at(1)); c is the default queue for jobs run from a crontab(1) file.

       njob	The  maximum  number of jobs that can be run simultaneously in that queue; if more than njob jobs are ready to run, only the first
		njob jobs will be run, and the others will be run as jobs that are currently running terminate.  The default value is  100.

       nice	The nice(1) value to give to all jobs in that queue that are not run with a user ID of super-user.  The default value is 2.

       nwait	The number of seconds to wait before rescheduling a job that was deferred because more than njob jobs were running in  that  job's
		queue, or because the system-wide limit of jobs executing has been reached.  The default value is 60.

       Lines beginning with # are comments, and are ignored.

EXAMPLES

       Example 1: A sample file.

       #
       #
       a.4j1n
       b.2j2n90w

       This  file  specifies that the a queue, for at jobs, can have up to 4 jobs running simultaneously; those jobs will be run with a nice value
       of 1.  As no nwait value was given, if a job cannot be run because too many other jobs are running cron will wait 60 seconds before  trying
       again to run it.

       The  b  queue, for batch(1) jobs, can have up to 2 jobs running simultaneously; those jobs will be run with a nice(1) value of 2.  If a job
       cannot be run because too many other jobs are running, cron(1M) will wait 90 seconds before trying again to run it. All	other  queues  can
       have up to 100 jobs running simultaneously; they will be run with a nice value of 2, and if a job cannot be run because too many other jobs
       are running cron will wait 60 seconds before trying again to run it.

FILES

       /etc/cron.d/queuedefs	       queue description file for  at, batch, and  cron.

SEE ALSO

       at(1), crontab(1), nice(1), cron(1M)

SunOS 5.10							    1 Mar 1994							      queuedefs(4)

10 More Discussions You Might Find Interesting

1. Solaris

How to find number of processes ?

Discussion started by: ArabOracle.com

2. UNIX for Dummies Questions & Answers

checking if parameter passed is a number

Discussion started by: magnia

3. Programming

How to limit the number of child processes

Discussion started by: xyzt

4. Shell Programming and Scripting

Dynamic number of parameter

Discussion started by: co0oly