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enedebe
Asked: 2012-05-25 01:40:08 +0800 CST

How to get iostat of a single process

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

Thanks!

iostat

4 Answers

  1. Best Answer

    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.

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  2. Some useful tools:

    • iotop
    • htop (as instructed by B14D3)
    • btrace

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

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  3. 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.

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  4. 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.

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