problem of memory consumption in load with shibboleth SP 3 v3.2.0

[Alban VEYRET]

CONFIDENTIAL & RESTRICTED

Hello,

We are currently trying to improve one of our SSO component based on Shibboleth sp 3 v3.2.0
I an addition we are using Apache v2.4.

Both of them are contained inside a docker container.
It is working fine with our current use cases.

These use cases were until now with a low numbers of connections, we are now trying to support a traffic of 100 transaction per second.

After some changes in the configuration we are now struggling with the memory consumption.
It keeps increasing until reaching the maximum size allowed to our container and then the response time becomes unstable.

Regarding the recommendation done we are using the following settings:

-We are loading the module mpm_event_module modules/mod_mpm_event.so
(LoadModule mpm_event_module modules/mod_mpm_event.so in our apache mpm-conf)
If my understanding is correct, it means the version is not prefork.

-Our shibboleth configuration is in attached file.

We tried to setup a UnixListener with a stack size to override the default one as advised in the documentation but we did not get any significant improvement.

We are running out of ideas and would like to know if you have any clues that could help us to solve our memory issue with a heavy load.

Thanks in advance for your Help.

Regards

Alban

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