exit 0
Save this file and use chmod to give it executable permission. Then use crontab –e command to add the following line:
*/10 * * * * /home/testadmin/killtop >> $HOME/killtop.log 2>&1
It will run this script every 10 minutes and the script checks if the server has been consuming 100% CPU on average in last 10 minutes. If it is, then it will find the top CPU consuming process and kill it.
Now the CPU_THRESHOLD value needs some discussion. The “100% utilization” mark is 100 on a single-core system, 200, on a dual-core, 400 on a quad-core, etc. has a very nice discussion on this.
You can use OptiPNG and JpegTran, two utlities to heavily compress PNG and JPEG files in your website. Sometimes these tools save 70% file size.
First install these tools:
apt-get install opting
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