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Full Discussion: Cpu and memory usage scripts
Top Forums Shell Programming and Scripting Cpu and memory usage scripts Post 302990131 by Chubler_XL on Sunday 22nd of January 2017 03:06:38 PM
Old 01-22-2017
You could run the check from cron every minute and keep a count of the number of times the CPU is high in a dat file then you can warn via email if the CPU is high for more than x checks and also notify when it normalises again.

I run something like this myself:

Code:
#!/bin/bash
CHKFILE=/usr/wrk/CPU.dat
LIMIT=25
CMAX=5
USAGE=$(sar 5 6 | grep "Average")
IDLE=$(echo $USAGE | awk '{printf "%.0d", $8}')

# Read in number of past checks that have exceeded $LIMIT
[ -f $CHKFILE ] && read CPUCNT < $CHKFILE
CPUCNT=${CPUCNT:-0}

[ -z "$IDLE" ] && exit

if (( IDLE < LIMIT ))
then
   ((CPUCNT++))
   ((CPUCNT >= CMAX)) &&
   mailx -s "Sustained high CPU usage: $((100 - IDLE))%" anil@domain.com <<EOF
$(echo $USAGE | awk '{printf "User: %s%%, Nice: %s%%, System: %s%%, I/O Wait: %s%% Steal %s%%\n", $3, $4, $5, $6,$7,$8}')
EOF
else
   ((CPUCNT >= CMAX)) &&
   mailx -s "CPU usage normalised: $((100 - IDLE))%" anil@domain.com <<EOF
$(echo $USAGE | awk '{printf "User: %s%%, Nice: %s%%, System: %s%%, I/O Wait: %s%% Steal %s%%\n", $3, $4, $5, $6,$7,$8}')
   CPUCNT=0
EOF
fi

echo "$CPUCNT" > $CHKFILE

Edit:
In a similar way you can use sar -r 5 6 (5 readings averaged over 6 seconds each) to monitor memory usage - Look at column #4 for pct memory used.
The counts for number of readings exceeding limit could be stored in the same data file.

Last edited by Chubler_XL; 01-22-2017 at 04:21 PM..
 

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SCRIPT-EMAIL(8) 					  System Administration Commands					   SCRIPT-EMAIL(8)

NAME
script-email - Amanda script to send email notifications DESCRIPTION
script-email is an Amanda script implementing the Script API. It should not be run by users directly. It sends a notification email to the addresses specified in the MAILTO property. PROPERTIES
This section lists the properties that control script-email's functionality. See amanda-scripts(7) for information on the Script API, script configuration. MAILTO List of email addresses that will receive an email on command execution. It is a multi-valued property: property "MAILTO" "amanda@domain.com" "sysadmin@domain.com" "amandauser@domain.com" EXAMPLE
In this example, script-email is scheduled to be run before the DLE, on the server. The unqualified email address amanda will be passed to the email system unchanged. The script is then attached to a dumptype, which can then be specified for any DLEs which require notification. define script-tool pre-email { comment "email me before this DLE is backed up" plugin "script-email" execute-on pre-dle-backup execute-where server property "mailto" "amanda" } define dumptype user-tar-email { user-tar script "pre-email" } SEE ALSO
amanda(8), amanda.conf(5), amanda-client.conf(5), amanda-scripts(7) The Amanda Wiki: : http://wiki.zmanda.com/ AUTHORS
Jean-Louis Martineau <martineau@zmanda.com> Zmanda, Inc. (http://www.zmanda.com) Dustin J. Mitchell <dustin@zmanda.com> Zmanda, Inc. (http://www.zmanda.com) Amanda 3.3.3 01/10/2013 SCRIPT-EMAIL(8)
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