Hi All, I have a problem with a Moodle 2.7.20, we have 8 app server with ngix and we have problem with sessions. We tried with 2 config, sessions on files with NFS Server and sessions on memcached. The behavior is different, with sessions on files, the behavior is well, but, when we have many users connected, the php processes waits time to open the sessions files and the server begin to collapsed, with memcached the behavior is different, the server works well with high demand, but, randomly users lose the session and they should login into the moodle again and this happen many time.
We check all sessions parameters, we check all configurations on memcached, the problem begun one specific day and we don't know the root cause yet.
In particular I suspect a bug was activated with the sessions manager, but my Moodle consultants doesn't have argument to refute or sustain my theory.
Please, your help will be very appreciated.