JAVA_MAX_SESSIONSPACE_SIZE

Parameter type	Integer
Default value	0
Parameter class	Static
Range of values	0 to 4 GB

Java session space is the memory that holds Java state from one database call to another. JAVA_MAX_SESSIONSPACE_SIZE specifies (in bytes) the maximum amount of session space made available to a Java program executing in the server. When a user's session-duration Java state attempts to exceed this amount, the Java virtual machine kills the session with an out-of-memory failure.