This X_RUN parameter controls the Windows Desktop Heap in which child processes are created.
WDTM is inherited by child processes.
WDTM=N is the default.
WDTM=Y - the child process is created in the LANSA Desktop Heap no matter where it is started from (i.e. Interactive Desktop Heap (IDH) or Service Desktop Heap (SDH)).
WDTM=N - the child process is created in the Desktop Heap from which it started. Note, that if the current process was created in the LANSA Desktop Heap then the child process is also created in the LANSA Desktop Heap, but it is not controlled by LANSA and therefore too many processes may be created in a LANSA Desktop Heap. So, only set WDTM=N if the current process is the top most process. When a process is started by the operating system it will use either the IDH or SDH. In this case, setting WDTM=N is consistent with where a child process will be created - not in the LANSA Desktop Heap.
WDTM=I - the behavior is the same as for WDTM=N
For information about Desktop Heaps, refer to the the Web Administrator's Windows Desktop Heap Management in Load Management in the Web Administration Guide.