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 OSF1

queuedefs

queuedefs(4)						     Kernel Interfaces Manual						      queuedefs(4)

NAME

       queuedefs - Queue description file for at, batch, and cron commands

DESCRIPTION

       The  queuedefs  file describes the characteristics of the queues managed by cron or specifies other characteristics for cron.  Each noncom-
       ment line in this file describes either one queue or a cron characteristic.  Each uncommented line should be in one of the  following  for-
       mats.

	    q.[njobj][nicen][nwaitw] max_jobs=mjobs log=lcode

       The  fields  in these lines are as follows: The name of the queue.  Defined queues are as follows: The default queue for jobs started by at
       The default queue for jobs started by batch The default queue for jobs run from a crontab file

	      Queues d to z are also available for local use.  The maximum number of jobs that can be run simultaneously in  the  queue;  if  more
	      than  njob jobs are ready to run, only the first njob jobs will be run.  The others will be initiated as currently running jobs ter-
	      minate.  The nice(1) value to give to all jobs in the queue that are not run with a user ID of superuser.  The number of seconds	to
	      wait  before rescheduling a job that was deferred because more than njob jobs were running in that queue, or because the system-wide
	      limit of jobs executing (max_jobs) has been reached.  The maximum number of active jobs from all queues that  may  run  at  any  one
	      time.  The default is 25 jobs.  Logging level of messages sent to a log file.  The default is 4.	Defined levels are as follows:

	      level-code   level

		  0	   None

		  1	   Low

		  2	   Medium

		  3	   High

		  4	   Full

       Lines beginning with # are comments, and are ignored.

EXAMPLES

       The  following  file specifies that the b queue, for batch jobs, can have up to 50 jobs running simultaneously; that those jobs will be run
       with a nice value of 20.  If a job cannot be run because too many other jobs are running, cron will wait 60 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.  If a job cannot be run
       because too many other jobs are running cron will wait 60 seconds before trying again to run it.  b.50j20n60w

       The following file specifies that a total of 25 active jobs will be allowed by cron over all the queues at any one time, and cron will  log
       all messages to the log file.  The last two lines are comments that are ignored.  max_jobs=25 log=4 # This is a comment # And so is this

FILES

       Main cron directory The default location for the queue description file.

RELATED INFORMATION

       Commands: at(1), cron(8), crontab(1), nice(1)
       delim off

																      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