[users at bb.net] buildbot CPU usage

[Pierre Tardy]

Hi Francesco,

Your described setup looks sane to me.

The problems we are trying to catch are cpu spikes, as far as I understand,
which does not happen for very long, but are very annoying for users, as it
is blocking the reactor.

This problem is not easy to see in the profile you sent, as this profile is
over long time, so we see the average of each method during the day and not
the spikes.

What would really be needed is a on-demand profiler which would detect cpu
spikes and only log the stack traces during those times.

Here is a nice blog pst explaining why statistic profiling is cool and easy
to implement in python.
https://nylas.com/blog/performance

For 0.9.1 I want to concentrate on scalability, and write a debugging ui
plugin based on those ideas (and probably code)

That would be great if your team can help on that matter.

Regards,
Pierre
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