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Which VPS using most io [message #45147]

Wed, 01 February 2012 20:07

Wilki
Messages: 2
Registered: February 2012

Junior Member

I have noticed that the iowait on my node is starting to shoot up. Do you guys know any commands that will help me see which of the VPS's are using the most io and causing the iowait?

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Re: Which VPS using most io [message #45163 is a reply to message #45147]

Thu, 02 February 2012 22:26

mustardman
Messages: 91
Registered: October 2009

Member

I use iotop
http://guichaz.free.fr/iotop/

But if it's excessive logging then that won't tell you much.

Also watch top and when you see a busy process hit Ctl-C then
"vzpid PID" to see which VPS it's coming from.

Chasing down I/O loading can be a bit of a PiTA. There doesn't seem to be any one magic bullet that is good at tracking this down.

[Updated on: Thu, 02 February 2012 22:28]

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Re: Which VPS using most io [message #45164 is a reply to message #45147]

Fri, 03 February 2012 04:17

iowissen
Messages: 11
Registered: February 2012

Junior Member

data is stored in /proc/bc/<CTID>/ioacct

you may make a script to calculate all CT's ioacct increment (including reading writing etc.) with comparison to the previous value in order to find out the most consuming one.

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