Created
January 21, 2019 14:07
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memory leakage detection
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| # ps -A | grep ${PROCESS_NAME} | awk '{print $1}' | |
| get_pid() | |
| { | |
| process_name=$1 | |
| text=`ps -A | grep $process_name` | |
| # 去掉开头的空格 | |
| text=`echo $text | sed -e 's/^[ \t]*//g'` | |
| #没有这个进程 | |
| if [ "${text}" = "" ] ; then | |
| pid=0 | |
| echo ${pid} | |
| return 0 | |
| fi | |
| # 得到进程号之后的空格 | |
| pos=`expr index "$text" " "` | |
| pos=`expr $pos - 1` | |
| #截取进程号 | |
| pid=`echo $text | cut -c 1-$pos` | |
| #echo pid=---$pid+++ | |
| echo ${pid} | |
| return 0 | |
| } | |
| # cat /proc/${pid}/status | grep VmRSS | awk '{print $2}' | |
| get_mem() | |
| { | |
| process_id=$1 | |
| text=`cat /proc/${process_id}/status | grep VmRSS` | |
| #没有这个进程 | |
| if [ "${text}" = "" ] ; then | |
| memory=0 | |
| echo ${memory} | |
| return 0 | |
| fi | |
| pos=`expr index "$text" " "` | |
| text=`echo $text | cut -c $pos-` | |
| pos=`expr index "$text" " "` | |
| pos=`expr $pos - 1` | |
| memory=`echo $text | cut -c 1-$pos` | |
| #echo memory=---$memory+++ | |
| echo ${memory} | |
| return 0 | |
| } | |
| # 最好是参数传递 | |
| PROCESS_NAME="quantum6" | |
| # 有人指点，也可以一条命令搞定： | |
| # ps -A | grep ${PROCESS_NAME} | awk '{print $1}' | |
| pid=$(get_pid ${PROCESS_NAME}) | |
| #没有这个进程 | |
| if [ "${pid}" = "0" ] ; then | |
| max_memory=0 | |
| else | |
| max_memory=$(get_mem ${pid}) | |
| fi | |
| echo pid=${pid}, max_mem=${max_memory} | |
| # 循环。如果内存增加，输出变化情况。 | |
| while [ true ] ; do | |
| sleep 1s | |
| # 得到进程号 | |
| pid=$(get_pid $PROCESS_NAME) | |
| if [ "${pid}" = "0" ] ; then | |
| # 没找到，复位 | |
| max_memory=0 | |
| continue | |
| fi | |
| # 得到进程使用的内存。 | |
| # cat /proc/${pid}/status | grep VmRSS | awk '{print $2}' | |
| current_memory=$(get_mem ${pid}) | |
| if [ "${current_memory}" = "0" ] ; then | |
| continue | |
| fi | |
| # 如果占用内存增加了，输出 | |
| if [ ${current_memory} -gt ${max_memory} ] ; then | |
| echo | |
| echo --------------------------------- | |
| date | |
| diff=`expr ${current_memory} - ${max_memory}` | |
| echo ${current_memory} - ${max_memory} = ${diff} | |
| max_memory=${current_memory} | |
| fi | |
| done |
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