April 2018
Intermediate to advanced
508 pages
15h 22m
English
Content preview from PostgreSQL 10 High Performance - Third Edition
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iotop for Linux
It's also possible on Linux to get per process I/O statistics, so you can see exactly who is reading and writing heavily, using a program named iotop. This data isn't available in mainstream Linux until kernel 2.6.20, and the iotop program requires Python 2.5, too. RedHat RHEL 5 doesn't meet either requirement. RedHat has been working on getting the I/O statistics back ported to their mainstream 2.6.18 kernel and working through the Python issues too. By RHEL 5.7, it may be fully available; refer to https://bugzilla.redhat.com/show_bug.cgi?id=557062 to track their progress.
If you're running on a system with a more recent kernel, as may be the case for Debian or Ubuntu users, make sure to try iotop out once you've seen heavy ...
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