linux下tomcat内存监控脚本

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linux下tomcat内存监控脚本
#!/bin/sh
#========linux下tomcat内存监控脚本2008-04-9=============
set -o xtrace

#===============设置java路径============================
export JDK_HOME=/usr/java/jdk1.5.0_12
export JAVA_HOME=/usr/java/jdk1.5.0_12
export LC_ALL=zh_CN.GB18030

#===============设置tomcat路径==========================
tomcat_path=/usr/tomcat5.0
tomcat_log=/home/tomcat_memory.log

#允许最大占用内存的百分比
ram_max=40
#取java的pid
pid_ram=`ps -ef | grep java| grep -v "grep"|awk '{print $2}'|xargs|awk '{print $1}'`

#显示pid
ram=`ps -e -o 'user,pid,%cpu,%mem,vsz,rss,tty,stat,start,time,command' |grep java|grep -v grep |awk '{print $4}'|xargs|awk '{print $1}'`

#调试程序用
#echo $port
#echo $pid_ram
#echo $ram
#echo $ram_max

#如果所占用的内存使用率大于所定义的值，则重启该服务程序
if expr $ram \>= $ram_max > /dev/null
then

#所要执行的动作
# echo 2
#edho "$ram.`$ram`">>$tomcat_log
echo "`date "+%F %T %A"`tomcat出现内存溢出，稍后将重新启动tomcat" >>$tomcat_log
kill -9 $pid_ram

sleep 10

$tomcat_path/bin/catalina.sh start
echo "`date "+%F %T %A"`tomcat is start" >>$tomcat_log
fiset +o xtrace