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1、查看版本
cat /etc/debian_version
7.8
2、看下内存(我这边是256MB内存 swap分了4G)
free -m
total used free shared buffers cached
Mem: 231 124 106 0 8 79
-/+ buffers/cache: 36 194
Swap: 3814 0 3814
3、使用stress模拟占用swap分区环境
stress --cpu 1 --io 1 --vm 2 --vm-bytes 25000000 --vm-keep --verbose
4、查看到swap分区不断在使用
5、使用脚本分析下
#!/bin/bash
#--------------------------------------------------
#Created:2015-05-20
#Author:jimmygong
#Mail:jimmygong@taomee.com
#Function:
#Version:1.0
#--------------------------------------------------
function swapoccupancy ()
{
echo -e "Pid\tSwap\tProgame"
num=0
for pid in `ls -1 /proc|egrep "^[0-9]"`
do
if [[ $pid -lt 20 ]]
then
continue
fi
program=`ps -eo pid,command|grep -w $pid|grep -v grep|awk '{print $2}'`
for swap in `grep Swap /proc/$pid/smaps 2>/dev/null|awk '{print $2}'`
do
let num=$num+$swap
done
echo -e "${pid}\t${num}\t${program}"
num=0
done|sort -nrk2|head
}
swapoccupancy
exit 0
6、我这边脚本写的是取占用前10的
7、提供下高手写的脚本
#!/bin/bash
cd /proc
for pid in [0-9]*; do
command=$(cat /proc/$pid/cmdline)
swap=$(
awk '
BEGIN { total = 0 }
/Swap/ { total += $2 }
END { print total }
' /proc/$pid/smaps
)
if (( $swap > 0 )); then
if [[ "${head}" != "yes" ]]; then
echo -e "PID\tSWAP\tCOMMAND"
head="yes"
fi
echo -e "${pid}\t${swap}\t${command}"
fi
done