This is cool - I've built a simple version of this sorta system before Rollbar et al existed and just stored the aggregated events in memory. I'd just keep the

This is cool - I've built a simple version of this sorta system before Rollbar et al existed and just stored the aggregated events in memory. I'd just keep the most recent occurrence only - not every event - and the times the exception occurred so I could see how often it was happening over the last N seconds (hours, days, etc).