How to get iostat of a single process

Question

How can I get iostats io throughput of just a process to try know if this process starts burning my HDD.

Thanks!

score 8 · Accepted Answer · answered May 24 '12 at 09:49

8

Assuming a recent version of Linux, I'd look at the iotop utility.

You don't mention your distribution of Linux, but the tool is available for most in the default package repositories.

answered May 24 '12 at 09:49

ewwhite

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iotop does not show iops though, like iostat does, which is increasingly becoming a critical metric to track since that's a key throttle point for cloud vendors – Jacob Davis-Hansson Jul 06 '20 at 15:10
@JacobDavis-Hansson I'm not even sure "The Cloud" was a major focus at the time I wrote this answer (8 years ago). – ewwhite Jul 06 '20 at 19:59
Oh my, I didn't realize how old this answer was. Fair! – Jacob Davis-Hansson Jul 08 '20 at 00:09

score 2 · Answer 2 · answered May 24 '12 at 09:49

2

Some useful tools:

iotop
htop (as instructed by B14D3)
btrace

... and if you ever need to see per-process network usage, try nethogs.

answered May 24 '12 at 09:49

Janne Pikkarainen

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score 2 · Answer 3 · answered Jun 06 '17 at 08:34

You can get the I/O data from /proc/[pid]/io file (or simply /proc/self/io for the current process). I/O performed in subprocesses is inherited as those terminate, so reading the line "write_bytes" before and after your task should give a reasonable estimate. However, this doesn't take different devices into account.

B14D3 · Answer 4 · 2012-05-24T10:02:42.353

1

Htop can display io stats per process. You have to only setup to display propper colums by pressing f2 and add io_rate io_write_reate and io_read_rate from menu Setup>Columns

You can use iotop.

edited May 24 '12 at 10:02

answered May 24 '12 at 09:43

B14D3

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How to get iostat of a single process

4 Answers4