Report Busiest Thread in terms of CPU Usage

[ncabatoff]

Report Busiest Thread in terms of CPU Usage

[ncabatoff]

There is an existing option that should satisfy your need: enable thread-based metrics using the -threads option. Then use the metric namedprocess_namegroup_thread_cpu_seconds_total.

I've updated the README to give more details.

[PeterZaitsev]

Hi Nick,

I was able to verify your solution and it does not work. --threads seems to do the grouping by thread name and not thread_id, which are really set in reality even if they are they are not unique.

For example for MySQL I see:

namedprocess_namegroup_thread_cpu_seconds_total{cpumode="user",groupname="mysqld",threadname="mysqld"} 1.1299999999996544

Only one line even through MySQL has 300 threads on this box.

I think being able to spot the hot threads is quite valuable as CPU usage itself does not make a difference whenever one thread was using CPU or multiple