boontifex

There are also references of `room_id` in table `current_state_delta_stream` which held the reference `stream_id` to table `cache_invalidation_stream_by_instance`. `cache_invalidation_stream_by_instance` has a column `cache_func`. Any ideas how this is been used and...

@richvdh I didn't really find the comprehensive documentation how synapse stores data and why, but i've give some thoughts. Events (joining, leaving, messages etc) are stored in the tables `events`...