Iotop
Posted by bene - 30/06/08 at 11:06:55 pm
One of the drawbacks of top is that it often can’t help to spot processes which push up system load so high.
High system loads are often caused by very I/O intensive tasks.
And as I/O intensive needn’t mean CPU intensive, those tasks may not even show up in top.
This is where Iotop comes into play. It is just a python script which evaluates the per-task disk I/O accounting statistics exported by the Linux kernel (2.6.20+).
This is what you need to enable in your kernel configuration:
General setup
[*] Export task/process statistics through netlink (EXPERIMENTAL)
[ ] Enable per-task delay accounting (EXPERIMENTAL)
[*] Enable extended accounting over taskstats (EXPERIMENTAL)
[*] Enable per-task storage I/O accounting (EXPERIMENTAL)
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