My django app makes heavy calculations which can be infinite.
That's why, when user enters the site, i.e. makes a request, heavy
calculations are wrapped into multiprocessing.Process which runs at most 7
seconds.
I can't use threads, because third-party packages are not thread-safe.
So, I have around 30 concurrent requests per second. If each request can
take up to 7 seconds, then it is 30*7=210 concurrent requests in the worst
case.
Each of these concurrent requests opens multiprocessing.Process, which
gives (I guess) 210*2=420 (close to 500) concurrent requests in the worst
case.
That' how I got 500 requests. Possibly, my calculations are incorrect.
Average page load time (average response times) is 10 seconds.
I use MPM worker.
I set WSGIProcessGroup
StartServers 100
ServerLimit 500
ThreadsPerChild 1
ThreadLimit 1
MaxRequestWorkers 500
MaxConnectionsPerChild 10000
WSGIApplicationGroup %{GLOBAL}
WSGIDaemonProcess django_app processes=75 threads=1 python-path='...'
maximum-requests=10000 request-timeout=20
WSGIProcessGroup django_app
WSGIRestrictEmbedded On
WSGILazyInitialization On
On Monday, August 10, 2020 at 1:12:30 PM UTC+3, Graham Dumpleton wrote:
>
> What sort of application are you running?
>
> What is your average response times?
>
> Do you have long running requests, if yes, how long?
>
> What Apache MPM are you actually using?
>
> My initial impression is that is a quite poor configuration which is only
> going to chew up huge amounts of memory for no good reason, but I don't
> know your application requirements.
>
> Also, are you even setting WSGIProcessGroup? If it isn't set it makes the
> whole daemon process configuration moot as it isn't even being used.
>
> On 10 Aug 2020, at 7:24 pm, Paul Royik <[email protected] <javascript:>>
> wrote:
>
> StartServers 50
> ServerLimit 200
>
> ThreadsPerChild 1
> ThreadLimit 1
>
> MaxRequestWorkers 200
> MaxConnectionsPerChild 10000
>
> WSGIApplicationGroup %{GLOBAL}
> WSGIDaemonProcess process processes=75 threads=1
>
>
>
> Is it enough? Or can it handle only 75 concurrent requests? I don't know how
> to synchronize apache and mod_wsgi settings.
>
>
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