Currently we're dealing with an issue where SOAP requests to our production APM environment are taking a very long time to complete, causing timeouts within some of our systems. Also see a slow connection to the APM UI (ex. localhost:8081)
This situation was caused because the customer had configured his Agents to connect the MOM on port 8081.
In the IntroscopeAgent.profile
The Jetty webservice is configured to have 100 concurrent connection by default and this customer had many agent going to this URL.
This is a supported method to have an agent communicate with the mom the first recommendation is
From more information please check out "Connect to the Enterprise Manager Using a Direct Socket Connection"
Customer revised configuration of his agents and SOAP and APMUI returned to normal.