Commented by: Sean Leyne (seanleyne)

For context, how many event (and clients) registrations are we talking about?

Commented by: @pcisar

This limit should be on memory size, not on number of events registered. Right now event table can grow without limits (and when it exceeds several hundred MB's it will cause serious problems, especially when event table management code in engine will not be changed to be more effective and faster). I guess that sensible default limit of 128MB with possibility to change it in configuration would be a good start. Event registration data structure has variable size in relation to event names, so actual number how many events could registered in total will vary.

This request was sparked by real situation when badly written application registered interest for event notification every 20ms. This eventually hangs the server. Right now engine doesn't have any defense to this scenario.