How to modify Periodic Discovery intervals as it's taking a long time in discovery on the Admin Server.
The metrics (from the mbeans) for a managed server are collected by two agents - a) the agent monitoring the individual managed server and b) by the agent monitoring the admin server. The admin server agent thus collects metrics for its own and for all of the managed servers. We do that so as to make these metrics available even if users choose to monitor only the admin server.
The best way is to configure the agent monitoring admin server so as not to collect metrics on the Managed Servers. If they already have individual agents monitoring the managed servers, this configuration would result in no data loss.