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Thursday 4 April 2013

Use Full tips to find out load issues on the Linux Server(Server with Cpanel as well)

Finding Load causing connections and users

Below are certail scripts the user that is causing the load and for finding the procees,ip which has high cpu usage.

To check number of IPs connected to port 80
# netstat -tn 2>/dev/null | grep ':80 ' | awk '{print $5}' |sed -e 's/::ffff://' | cut -f1 -d: | sort | uniq -c | sort -rn | head

To list number of connections to domains in the server
# /usr/bin/lynx -dump -width 500 http://127.0.0.1/whm-server-status | awk  'BEGIN { FS = ” ” } ; { print $12 }' | sed '/^$/d' | sort | uniq -c | sort -n

To list the Busiest Site in the server
# /usr/bin/lynx -dump -width 500 http://127.0.0.1/whm-server-status | grep GET | awk '{print $12}' | sort | uniq -c | sort -rn | head

To list the Busiest Script running on the server
# /usr/bin/lynx -dump -width 500 http://127.0.0.1/whm-server-status | grep GET | awk '{print $14}' | sort | uniq -c | sort -rn | head

To list the most running process in the server
# ps aux | awk '{print $1}' | sort | uniq -c | sort -nk1 | tail -n5

To list the total process running by the users
# ps aux | awk '{print $1}' | sort | uniq -c | sort -nk1

When we see the process in the top result with “php” or “/usr/bin/php”, we can find the directory it is working with. You can use,
# for i in `ps -ef | awk '/php/{print $2}'`; do ls -l /proc/${i}/cwd; done

We can even check this dynamically with in a particular time limit, say 5 sec. We can use it as below.
# while true; do clear; for i in `ps -ef | awk '/php/{print $2}'`;do ls -l /proc/${i}/cwd; done; sleep 5; done

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