I am lurking with interest, but am no expert to answer your question.
> Am 23.06.2016 um 14:55 schrieb Luca Toscano <toscano.l...@gmail.com>:
>
>
>
> 2016-06-18 11:53 GMT+02:00 Luca Toscano <toscano.l...@gmail.com>:
> Hi Apache devs!
>
> I have a question for you about the following users@ email thread:
>
> -
> https://lists.apache.org/thread.html/ba26440a53773426e29296569bec17692c77a4a3bd07e8b5331474c4@1464703063@%3Cusers.httpd.apache.org%3E
>
> This one is about Yann's fix for the MinSpareThreads lower bound calculation
> for worker/event: http://svn.apache.org/viewvc?view=revision&revision=1737447
>
> I was able to explain how it works in case of bucket = 1, but I have doubts
> when buckets > 1. I've read event/worker code and IIUC:
>
> 1) min_spare_threads = threads_per_child * (num_buckets - 1) + num_buckets
> 2) max_spare_threads = min_spare_threads + threads_per_child * num_buckets
> 3) idle_spawn_rate controls the amount of new children created in each
> perform_idle_server_maintenance run.
> 4) perform_idle_server_maintenance is called per bucket and calculates
> max|min_spare_threads accordingly.
>
> Rick's question in the email thread is about what happens when, with two
> buckets and two processes for example, httpd reaches 50% of idle threads. I
> made some calculations and an extra process should be indeed created, but
> then killed because of the max_spare_threads limit. Is it going to keep
> creating/destroying child processes or does idle_spawn_rate prevents it?
>
> Final goal would be to add notes in (Min|Max)SpareThreads documentation to
> warn users about the (good) side effects of setting ListenCoresBucketRatio
> (there is a reference in the trunk doc but very generic, it would be great to
> have more details IMHO).
>
>
> Anyone? :)
>
> Thanks!
>
> Luca
