Server meaning the one your client connects to. The resource requirements of joining a busy room with lots of members is mainly RAM, and it spikes at join and

Server meaning the one your client connects to. The resource requirements of joining a busy room with lots of members is mainly RAM, and it spikes at join and initial sync, but does then occupy room in memory and the DB to maintain state for all the activity in that room. For something like ##rust you should expect to see an initial spike of a few hundred MB of RAM which then dies down again. This can be optimised massively, but we haven't got to it in Synapse yet. (Dendrite is looking way better though).