iotop

Written by

Yujin Boby

iotop shows which process is doing disk I/O.

Shows only tasks doing I/O:

iotop -oPa

-o toggles “only active I/O”
-a accumulates I/O per process
-P shows per-process (not threads)

If you get SWAPIN/IO% warning, run

sysctl -w kernel.task_delayacct=1

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