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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
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4、查看到swap分区不断在使用
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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
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grep
-w $pid|
grep
-
v
grep
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awk
'{print $2}'
`
for
swap
in
`
grep
Swap
/proc/
$pid
/smaps
2>
/dev/null
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awk
'{print $2}'
`
do
let
num=$num+$swap
done
echo
-e
"${pid}\t${num}\t${program}"
num=0
done
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sort
-nrk2|
head
}
swapoccupancy
exit
0
6、我这边脚本写的是取占用前10的
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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
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本文转自 xdoujiang 51CTO博客，原文链接：http://blog.51cto.com/7938217/1653649，如需转载请自行联系原作者
