Are information events also subject to the System Center->Database->Maintenance->Limit alarms by maximum number setting? In other words, if "Limit alarms by maximum number " is set to 300000 then is the info database table that stores all the information events also limited to the same 300000 number of events?
That is a correct statement, on a MySQL system you can limit by number of events and this setting indeed immediately applies to both alarm and information events. From then onwards the delete query will take this new number into account on that DMA (which runs +- every hour).
On a Cassandra system you can only configure a limit by time since everything is based on a time to live in Cassandra but here we have the same thing, if you limit by time it will immediately apply to both information and alarm events.
Interesting note: this is only for new events because we have to set the time to live before we store the data.