JAVA_SOFT_SESSIONSPACE_LIMIT

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_SOFT_SESSIONSPACE_LIMIT specifies (in bytes) a soft limit on Java memory usage in a session, as a means to warn you if a user's session-duration Java state is using too much memory. When a user's session-duration Java state exceeds this size, Oracle generates a warning that goes into the trace files.