View from the top

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The venerable (and still exceedingly useful) top tool is immensely useful for seeing who is consuming all your CPU and memory. However, it’s not so good on showing who is eating your disk IO, or network bandwidth. Unsurprisingly, people have run with the top concept and produced a wide range of other tools: iotop, to […]

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Tracing I/O usage on Linux

By | Technical | One Comment

I/O subsystems are a whole industry of their own, and many libraries could be (and probably have been) written on the subject already. The particular sub-topic I’m talking about today is when you are faced with a machine that you suspect to be suffering from heavy I/O load, and you want to find the culprit. […]

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