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Scripting for monitoring the memory usage of some processes

Posted on 2002-07-11
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Last Modified: 2013-12-27
Hi All
I need a script which monitors the memory usage of the machine for some specific processes.

Something like

./CheckUtilisation.sh <process handle> <threshold>

and it outputs let's say "Yes" if threshold exceeeds.

Regards
Khem
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Question by:k_suchdeva
9 Comments
 
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Expert Comment

by:Otetelisanu
ID: 7145799
Install

application RMCmem         The MemTool Package

and you have all for memory.

Example:
memps ang gui programms.
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by:k_suchdeva
ID: 7145801
I only want a simple script.

Can not install third party packages.
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by:Otetelisanu
ID: 7148515
what is your Solaris ???

2.6, or 2.7 or 2.8 or 2.9
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by:k_suchdeva
ID: 7148554
uname -a
SunOS XXXXXXX 5.7 Generic_106541-16 sun4u sparc SUNW,Ultra-80


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by:ahoffmann
ID: 7148716
not for a specified process, but probably worth looking at it:
   man sar
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Expert Comment

by:emrehayretci
ID: 7153417
Improve the following script. It should help you.


frequency=3

while (true); do
STATUS=`vmstat $frequency 3| awk -e '{print $5}'`
LASTSTATUS=`echo $STATUS| awk -e '{print $5}'`
if [ $LASTSTATUS -lt <put your trshhold>]; then
    echo "TreshHold Exceeds"
    <write want to want to do in here(i.e. send mail to
    someone)>
fi

done
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Accepted Solution

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blowfish earned 400 total points
ID: 7218950
Hi,  

The answer proposed by emrehayretci, uses the vmstat command to display the machine's virual memory and CPU statistics.  If you want to monitor resource usage of a process, then you need to use the ps command.  So, here is a solution to your question.  You could read the man page for ps, for more information regarding the command line options.  

I'm not sure what you mean by <process handle>, so I'm going to assume that you meant process-id, or, PID.  Memory usage can be reported as a process's total virtual size (VSZ), or it's current resident memory size (RSS).  I will assume that you want to monitor it's total virtual size.  

To get a detailed (-f for full) list of all (-e for everything) processes on the machine, use the command:

  ps -ef

This listing however does not give you the memory usage that you are looking for, so, you'll have to use the -o command line option.  The -o command line option tells ps what colums to display in it's output.  You will need to use the following command to list all processes, the user, the process-id, the virtual size (kb), and the command-line arguments:

  ps -e -o user,pid,vsz,args

Now that you can list the information, we need to wrap it in a script that can extract the details of the processes that you are interested in.  

For something like this, I usually use awk.  Awk is a natural when it comes to selecting data that is presented in columns.  Let's say that you want to monitor all of root's processes, and report on any that are bigger than 1024kb:

while :
do
  ps -e -o user,pid,vsz,args | awk '$1 ~ /root/ && $3 > 1024 {print}'
  echo "  sleeping ..."
  sleep 30
done

Hope this helps,

--frankf
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by:tfewster
ID: 8003363
No comment has been added lately, so it's time to clean up this Topic Area.
I will leave a recommendation for this question in the Cleanup topic area as follows:

- Answered by blowfish

Please leave any comments here within the next 7 days

PLEASE DO NOT ACCEPT THIS COMMENT AS AN ANSWER !

tfewster
Cleanup Volunteer
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by:SpideyMod
ID: 8065839
per recommendation

SpideyMod
Community Support Moderator @Experts Exchange
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