@Michael.Green ,  The internal collection's default limit is 550 items, however it can be raised using the node property "SqlCacheHolder-connectionVsZosSSID-limit / SqlCacheHolder-connectionVsURL-limit" and the warning messages will no longer appear. Add below Node Property:  property name: SqlCacheHolder-connectionVsZosSSID-limit description: SqlCacheHolder-connectionVsZosSSID-limit type: Integer Value: (default is 550) increase it to 800 or 900 property name: SqlCacheHolder-connectionVsURL-limit description: SqlCacheHolder-connectionVsURL-limit type: Integer Value: (default is 550) increase it to 800 or 900 Doc link to add/edit node property: https://docs.appdynamics.com/appd/23.x/latest/en/application-monitoring/administer-app-server-agents/app-agent-node-properties  Please reset all problematic tier nodes from the controller user interface after setting the node properties. Please see the document link:  https://docs.appdynamics.com/appd/23.x/latest/en/application-monitoring/administer-app-server-agents/manage-app-agents#id-.ManageAppAgentsv23.1-ResetAppAgents The application's operation shouldn't be affected by these messages, but you shouldn't see them in the logs either after adding these properties and resetting the agent. If the problem persists, please start a support ticket and attach the debug agent logs that were generated by the problematic node during the problematic time span. ... View more