linux 监控进程所消耗的资源（内存），达到阈值（绝对值、相对值）后，将其杀死

监控某个python进程是否存在，如不存在则启动

#!/bin/bash
while [ 1 ]
do
    #打印出当前的jboss进程：grep jboss查询的jboss进程，grep -v "grep" 去掉grep进程
    jmsThread=`ps -ef | grep DirectServer | grep -v "grep"`
#    echo $jmsThread
    #查询jboss进程个数：wc -l 返回行数
    count=`ps -ef | grep DirectServer | grep -v "grep" | wc -l`
#    echo $count
    if [ $count -eq 0 ]; then
     s="cd /root/tools/trunk/bin;nohup python DirectServer.py start"
     eval $s
#      echo "bad!"
#    else
#     echo "ok"
    fi
done