nickva commented on issue #5640:
URL: https://github.com/apache/couchdb/issues/5640#issuecomment-3324591627

   That would neat to have @sergey-safarov, thanks for the link to 
https://www.rabbitmq.com/blog/2022/05/31/flame-graphs
   
   Our Erlang version is high enough and we can set `+JPperf true` and limit 
scheduler threads (`+S 4`) in vm.args easily.
   
   We used this a few times to various bottlenecks in the past. I also have 
various snippet to use eprof and fprof but Linux perf-stack is so much nicer of 
course.
   
   One missing part is generating load. There is an internal `fabric_bench` but 
it's a very simply, sequential cluster benchmark, just to "kick the tires" as 
they say.  I have a few k6 scripts I use sometimes for a concurrent load but 
those may need some cleanup and k6 may not be everyone's favorite.


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