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| 1 2 3 4 5 6 7 8 9 10 11 12 | 我的博客已迁移到xdoujiang.com请去那边和我交流 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 |
| 1 | 4、查看到swap分区不断在使用 |
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 | 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 |
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | 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 |