marcus007

Member
Nov 5, 2013
7
0
1
cPanel Access Level
Root Administrator
top - 01:40:27 up 6 min, 1 user, load average: 1.33, 1.56, 0.71
Tasks: 150 total, 1 running, 149 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.0%us, 0.1%sy, 0.0%ni, 99.9%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 3089732k total, 1343940k used, 1745792k free, 33180k buffers
Swap: 6289408k total, 0k used, 6289408k free, 775212k cached

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why IO 100% it came to my server down.

How I resolve it

Thank you

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iostat
Linux 2.6.18-371.1.2.el5 (pingpong.ussserver.com) 11/10/2013

avg-cpu: %user %nice %system %iowait %steal %idle
0.87 0.01 0.29 8.40 0.00 90.42

Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn
sda 24.44 1583.17 143.66 1897029 172144
sda1 0.07 1.74 0.01 2082 10
sda2 3.26 145.35 18.84 174170 22576
sda3 0.25 5.48 1.44 6562 1720
sda4 0.00 0.01 0.00 8 0
sda5 13.84 1301.31 58.03 1559291 69538
sda6 5.57 103.19 61.00 123643 73098
sda7 0.03 1.36 0.00 1624 0
sda8 1.40 24.36 4.34 29193 5202

- - - Updated - - -

top is normal
 

quietFinn

Well-Known Member
Feb 4, 2006
1,222
87
178
Finland
cPanel Access Level
Root Administrator
I'm not sure what you are asking?

"99.9%id" means the server is 99.9% idle.
 

ravi9

Well-Known Member
Oct 31, 2013
65
1
6
India
cPanel Access Level
Website Owner
%id is the amount of time the CPU has been idle, that is, doing nothing.
Is your server UP and running fine??
 

fabin

Active Member
Nov 27, 2009
29
0
51
Gods Own Country
You have to watch for the %wa value to monitor IO wait ( which is next to %id ). If that value stays above 30%, then it is not a good sign and means poor performance of disk or some process is reading/writing too much data that the storage device.

You can also use "iotop" command to get a list of processes that are causing the high IO.

More details here Linux iotop: Check What’s Stressing And Increasing Load On Your Hard Disks