The Tomcat thread pool settings provide the main worker threads that handle incoming connections before handing operations off to other subsystems. The default maximum thread value of 250 is sufficient for most workloads. Adjust the value to increase the number of threads that can be executed simultaneously or decrease the value to help prevent CPU overload.
In a clustered server environment, you must update the file on each server node.
You can also add a minThreads property to this file.