WebSphere EJB pool morass
Instead, you must set a JVM argument
com.ibm.websphere.ejbcontainer.poolSize, which applies to all manner of creatures -- message driven, stateless and entity beans. Wonderful! The property value for any serious application looks cryptic, if anything. Read their documentation for details. When not specified, the values 50 and 500 are used.
They might as well tie our hands behind our backs.