How can i generate the alterts if CPU utilization goes above 90%

[praveen..]

Hi all,
I have sendmail configured on my server.
i need to generate the alterts on my email id if CPU utilization goes above 90%.

how can i do this?
please suggest

[Arunvijai_4 · Accepted solution]

Hi Praveen,

You may have to write a shell script for this, http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=1008702

Or, you have to use tools such as Openview performance manager, http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=989506

-Arun

[Michael Steele_2]

Something like

sar -u 1 10 |awk '{print $5}' | if [ "$5" -le 10 ]; then
echo "High CPU Utilization" | mailx -s 'subject' praveen@domain.com
fi

Note: You want to read %idle less then 10%.

[Darrel Louis]

Hi praveen,

If Openview isn't in the scope of your budget, check for BigBrother which is free for non-commercial use.
http://www.bb4.org/

Darrel

[Arturo Galbiati]

Hi,
If you have Glnace on your server I can send yu the script which sent by email an alert when 2 of the resources: memory, disc, cpu, swap are over a threshould.
Rgds,
Art

[praveen..]

hi,
yes i have glance plus utility,
please send me the script
thanks in advance

[Arturo Galbiati]

Hi,
you have to set the varaiabile MaiAdd with your email address.
HTH,
Art

[Raimo Lesonen_1]

This one checks if cpu-load average gets over 90% in the past hour. I find it better than just check sudden peaks.

LIMIT="90"
let VALUE=100-$(sar -s$(( $(date +%H)-1))|tail -1|awk '{print $5}')
if [ "$VALUE" -gt "$LIMIT" ]
then
mailx ...
fi

[praveen..]

Hi,
thanks for sending me the scripts.
please let me know how to configure it and is there any need to make some entries in crontab?

please let me know the full steps to use this scripts

thanks for your support.

[Arturo Galbiati]

Hi,
set the variabile MaiAdd to your email a ddress and add in crontab to run every 10 minutes:
3,13,23,33,43,53 * * * * res-cop-alert.ksh 90 >/tmp/res-cop-alert.log 2>71

I suggest you to perform some runs manually to understand how the script works.

HTH,
Art

[Steven E. Protter]

Shalom praveen,

You don't want to do this. Its perfectly normal for a system even with low usage, to jump over 90% CPU user once in a while.

You will find the alerts to be unhelpful.

What I recommend to do is use the code provided above to alert you when usage has been over 90% for a certain period of time.

SEP

[praveen..]

hi steven,
you are talking about which code?

can you please give me the full details to use that code.

thanks

[praveen..]

i copied this script in /tmp directory and added my email address in MaiAdd.

#cd /tmp
#ll
total 16
-rw-r--r-- 1 root sys 2306 Jun 19 04:43 277457.ksh
#mv 277457.ksh cpu_alert.ksh
# chmod 777 cpu_alert.ksh
#ll
total 16
-rwxrwxrwx 1 root sys 2306 Jun 19 04:43 cpu_alert.ksh
#ksh ./cpu_alert.ksh



./cpu_alert.ksh[3]: ^M: is not an identifier
logout root
#
#

what is this error?

[Pete Randall]

Usually ^M is a carriage return that results from migrating code from dos to unix. I would suggest running your code through the dos2ux command:

dos2ux cpu_alert.ksh > /tmp/cpu_alert.ksh
mv /tmp/cpu_alert.ksh cpu_alert.ksh


Pete

[praveen..]

#cd /tmp
#ll
total 16
-rwxrwxrwx 1 root sys 2306 Jun 19 04:43 cpu_alert.ksh

should i run these two commands, cpu_alert.ksh is in /tmp directory.

#dos2ux cpu_alert.ksh > /tmp/cpu_alert.ksh
#mv /tmp/cpu_alert.ksh cpu_alert.ksh

and now which command i need to use to run this script?

[Arunvijai_4]

Hi,

You can just # chmod 555 cpu_alert.ksh and
# ./cpu_alert.ksh to run the script

-Arun

[praveen..]

[/tmp]# ll
total 16
-rwxrwxrwx 1 root sys 2306 Jun 19 04:43 cpu_alert.ksh
[/tmp]# dos2ux cpu_alert.ksh >/tmp/cpu_alert.ksh
[/tmp]# ll
total 0
-rwxrwxrwx 1 root sys 0 Jun 19 05:33 cpu_alert.ksh

why it is making this file of 0 bytes?

[Arunvijai_4]

Hi Praveen,

Do a # strings cpu_alert.ksh > /tmp/cpu_alert.ksh

It should work.

-Arun

[praveen..]

it is also making it of 0 byte.

tmp]# ll
total 32
-rw-r--r-- 1 root sys 2306 Jun 19 04:43 277457.ksh
-r-xr-xr-x 1 root sys 2306 Jun 19 06:09 cpu_alert.ksh
[/tmp]# strings cpu_alert.ksh >/tmp/cpu_alert.ksh
[/tmp]# ll
total 16
-rw-r--r-- 1 root sys 2306 Jun 19 04:43 277457.ksh
-r-xr-xr-x 1 root sys 0 Jun 19 06:10 cpu_alert.ksh

[James R. Ferguson]

Hi Praveen:

If you are 'cd'ed to the '/tmp' directory and you do:

# dos2ux cpu_alert.ksh >/tmp/cpu_alert.ksh

Then, you are actually truncating the file before you begin filtering it! This nulls the file. That is the reason your file is now 0-byes long.

You should *change* the name of the output file to differ from its input file in this case.

Regards!

...JRF...

[praveen..]

#cd /tmp
#dos2ux cpu_alert.ksh >/tmp/cpualert.ksh
#./cpualert.ksh
*** Can't find server name for address 170.120.6.12: Query refused
*** Can't find server name for address 170.120.6.13: Query refused
*** Default servers are not available
./cpualert.ksh[57]: DebFlg: parameter not set
logout root
#

why i am getting this error?

everytime i am getting two more files in /tmp directory with name "root*****.err" & "root*****.out".
#cd /tmp
#ll
-rwxr-xr-x 1 root sys 2220 Jun 19 11:07 cpualert.ksh
-rw-r--r-- 1 root sys 233 Jun 19 11:41 gln_syntax_file
-rw-r--r-- 1 root sys 29 Jun 19 11:08 roota04239.err
-rw-r--r-- 1 root sys 37 Jun 19 11:08 roota04239.out
-rw-r--r-- 1 root sys 29 Jun 19 11:20 roota04599.err
-rw-r--r-- 1 root sys 74 Jun 19 11:20 roota04599.out
-rw-r--r-- 1 root sys 29 Jun 19 11:33 roota04977.err
-rw-r--r-- 1 root sys 74 Jun 19 11:33 roota04977.out
-rw-r--r-- 1 root sys 29 Jun 19 11:36 roota05039.err
-rw-r--r-- 1 root sys 74 Jun 19 11:36 roota05039.out
-rw-r--r-- 1 root sys 29 Jun 19 11:41 roota05141.err
-rw-r--r-- 1 root sys 74 Jun 19 11:41 roota05141.out

why are it not deleting the old files?

[Yogeeraj_1]

hi praveen,

a few comments:
1. You don't have to run the dos2ux command every time.
#dos2ux cpu_alert.ksh >/tmp/cpualert.ksh

2. Try to run the commands from the script individually to determine which command is causing the errors.

3. The deletion of th emporary files must be a logic in the script. So if there is no such commands in the script, these temporary files will be never deleted....

Hope this helps!

you may wish to post the content of the script here...




kind regards
yogeeraj

[praveen..]

script is already attached in the thread.

check above Arturo Galbiati's comment

[praveen..]

can any body please help?

[Arturo Galbiati]

Hi Praveen,
sorry for late reply but I was in vacation.
The temporary files are deleted an the end oif teh script if all went fine, otherwise in case of error they remained on teh error to help you in debug. Please, could you post teh contnet of one of teh .err files?
In seems me that teh script failed.
Rgds,
Art