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Full Discussion: Unix Script to find and kill a process with high memory utilization
Top Forums Shell Programming and Scripting Unix Script to find and kill a process with high memory utilization Post 302294612 by robinforlinux on Thursday 5th of March 2009 01:47:19 PM
Old 03-05-2009
Unix Script to find and kill a process with high memory utilization
Hi Unix Gurus i am somewhat new to unix scripting so need your help to
create a script as below.

# This script would find the process consuming memory beyond a certain #limit. if the meemory consumption is more than 100% for a period of 1
# minute for the specific process. the script would kill the process

top -n 1 -u user | grep ABC | awk '{print $1" "$10}' > pid_mem

#Example pid_mem where $1 is process id and $10 is %memory consumed
# file contains the pid and memory % as below example
12258 21.6
12298 51.5
19207 107.5
#read the text for file and determine the pid for process with %mem > 100
# example pid = 19207
#if exist # then iterate for sometime for the same process id to determine if the memory spike comes down for example

count=0
while (count <=5) {
top -n 1 -u user | grep $pid
if ($10 > 100)
sleep 10
if (count =5)
then if ($10 >100)
kill -9 $pid
echo "Memory is more than 100 so process killed" | mailx -r %date -s 'memory > 90%' abc@z.com
endif
endif
count =count + 1
endif
}
 

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LEARN ABOUT REDHAT

kill

KILL(1) 						     Linux Programmer's Manual							   KILL(1)

NAME

       kill - terminate a process

SYNOPSIS

       kill [ -s signal | -p ] [ -a ] [ -- ] pid ...
       kill -l [ signal ]

DESCRIPTION

       The command kill sends the specified signal to the specified process or process group.  If no signal is specified, the TERM signal is sent.
       The TERM signal will kill processes which do not catch this signal.  For other processes, it may be necessary to use the KILL  (9)  signal,
       since this signal cannot be caught.

       Most  modern  shells  have  a  builtin  kill function, with a usage rather similar to that of the command described here. The `-a' and `-p'
       options, and the possibility to specify pids by command name is a local extension.

OPTIONS

       pid... Specify the list of processes that kill should signal.  Each pid can be one of five things:

	      n      where n is larger than 0.	The process with pid n will be signaled.

	      0      All processes in the current process group are signaled.

	      -1     All processes with pid larger than 1 will be signaled.

	      -n     where n is larger than 1.	All processes in process group n are signaled.	When an argument of the form `-n' is given, and it
		     is  meant	to  denote  a process group, either the signal must be specified first, or the argument must be preceded by a `--'
		     option, otherwise it will be taken as the signal to send.

	      commandname
		     All processes invoked using that name will be signaled.

       -s signal
	      Specify the signal to send.  The signal may be given as a signal name or number.

       -l     Print a list of signal names.  These are found in /usr/include/linux/signal.h

       -a     Do not restrict the commandname-to-pid conversion to processes with the same uid as the present process.

       -p     Specify that kill should only print the process id (pid) of the named processes, and not send any signals.

SEE ALSO

       bash(1), tcsh(1), kill(2), sigvec(2), signal(7)

AUTHOR

       Taken from BSD 4.4.  The ability to translate process names to process ids was added by Salvatore Valente <svalente@mit.edu>.

Linux Utilities 						  14 October 1994							   KILL(1)
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