内存常用脚本

1、统计每个进程占用内存情况（单位KB）

rm eve_mem.txt
ps -eo pid,args > pri_pid.txt
while read line
do
        test_PID=`echo ${line}| awk '{print $1}'`
        test_NAME=`echo ${line}| awk '{print $1=null,$0}'`
        mem_VmRSS=`cat /proc/${test_PID}/status | grep  VmRSS` >/dev/null 2>&1 
        mem_VmHWM=`cat /proc/${test_PID}/status | grep  VmHWM` >/dev/null 2>&1 

        echo ${test_PID} ${mem_VmHWM} ${mem_VmRSS} ${test_NAME} | grep VmHWM | column -t >> eve_mem.txt


done < pri_pid.txt

2、计算所有内存占用总和

all_VmHWM_MEM=0
all_VmRSS_MEM=0
while read line
do
        test_VmHWM_MEM=`echo ${line}| grep VmHWM | awk '{print $3}'`
        test_VmRSS_MEM=`echo ${line}| grep VmRSS | awk '{print $6}'`
 
        all_VmHWM_MEM=`echo $(($all_VmHWM_MEM+$test_VmHWM_MEM))`
        all_VmRSS_MEM=`echo $(($all_VmRSS_MEM+$test_VmRSS_MEM))`    

done < eve_mem.txt

echo "max: ${all_VmHWM_MEM} use:${all_VmRSS_MEM}"

3、统计大于1G、大于500M、大于100M 的进程列表

echo "500M > pid_mem >= 100M"
while read line
do
        test_VmRSS_MEM=`echo ${line}| grep VmRSS | awk '{print $6}'`
        #echo ${test_VmRSS_MEM}
        if [[ ${test_VmRSS_MEM} -ge 102400 && ${test_VmRSS_MEM} -lt 512000 ]];
        then
            echo ${line}
        fi
done < eve_mem.txt

echo "1G > pid_mem >= 500M"
while read line
do
        test_VmRSS_MEM=`echo ${line}| grep VmRSS | awk '{print $6}'`
        #echo ${test_VmRSS_MEM}
        if [[ ${test_VmRSS_MEM} -ge 512000  && ${test_VmRSS_MEM} -lt  1024000 ]];
        then
            echo ${line}
        fi
done < eve_mem.txt
echo "pid_mem >= 1G"
while read line
do
        test_VmRSS_MEM=`echo ${line}| grep VmRSS | awk '{print $6}'`
        #echo ${test_VmRSS_MEM}
        if [ ${test_VmRSS_MEM} -ge 1024000 ];
        then
            echo ${line}
        fi
done < eve_mem.txt