쉘프로그래밍강좌071 : N초마다 한번씩 지속적으로 자동실행하는 쉘스크립트

#!/bin/csh

# name of this program : PROCH

# creator : 수퍼유저(www.linux.kr) PARK SUNG SOO

# Email : papa@superuser.co.kr

set t = 1

while (t != 0)

uptime

echo "#########  `date`  ##########"

set uptime_variable = (`uptime`)

@ a = $#uptime_variable - 2

set uptime_count = (`uptime | awk '{print $'$a'}' | awk -F. '{print $1}'`)

set httpd_count = (`ps -ef | grep httpd | wc -l`)

set mysql_count = (`ps -ef | grep mysqld | wc -l`)

echo "System Load Average => $uptime_count"

echo "Apache process count => $httpd_count"

echo "Mysql process count => $mysql_count"

if ($uptime_count > 30 || $httpd_count > 300 || $httpd_count < 8 || $mysql_count < 3) then

   echo "Application Restarted...Now...."

   ps -ef | grep httpd | awk '{print $2}' | xargs kill -9

   ps -ef | grep mysql | awk '{print $2}' | xargs kill -9

   /usr/local/apache/bin/apachectl start

   /usr/local/mysql/bin/safe_mysqld -O max_connections=10000 -O table_cache=256 -O wait_timeout=100 &

endif

sleep 20s

end