When we try to search for users to enrol into an mnet course (through the remote enrolments client) the search returns no results. We believe this is to do with the number of users (we have 30,000). Another institution we are aware of has 10,000 users and a search for them takes 2 minutes to return a result. We are running Moodle 2.4.1.
Does anyone else strike this or have a solution?
It must also be murder when students login, without knowing anything about your setup.
If you are using MySQL then you might like to explore sharing the DB load a little. It requires a second DB machine and they share the DB but, one is a read and the other is write, they keep sync and it make life a little easier/faster. If you want to explore this option I will have to do some research, it can be done.