I may be adding noise, but it is worth checking if you are using third
party modules and which ones.

I don't know which version of Apache worked around issues with some
cases of  third party "misbehaving" modules, which would make workers
be gracefully closing for ever and that would also lead to graceful
restart leaving the servers without available workers.

If I were you I would first check the list of modules and with
mod_status the state of workers before issuing a graceful.

Cheers

El mar, 30 mar 2021 a las 2:49, Eric Covener (<cove...@gmail.com>) escribió:
>
> > Are graceful restarts with the Event MPM known to be problematic?
>
> Not especially. Not much different from worker. Ultimately if requests
> are hung, gracefully exiting processes can hang around a long time and
> take up space needed by processes running after the restart.
>
> What are your current MPM settings and how busy is your server during
> rotation? If ServerLimit is above MaxClients/ThreadsPerChild the extra
> scoreboard space is what allows the old generation of processes to
> gracefully exit while a new generation spins up.
>
> Does your logrotate script restart multiple times in succession for
> many log files?
>
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-- 
Daniel Ferradal
HTTPD Project
#httpd help at Freenode

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