If you have many calls to the REXX language environment on your AIX system, consider setting the RXQUEUE_OWNER_PID environment variable to 0. Macros that make many calls to the REXX language environment can easily spawn many processes, swamping system resources.
You can set the environment variable in one of three ways:
@DTW_rSETENV("RXQUEUE_OWNER_PID", "0")
/etc/environment: RXQUEUE_OWNER_PID = 0
This method affects the behavior of REXX for the whole machine.
InheritEnv RXQUEUE_OWNER_PID = 0
This method affects the behavior of REXX for the Web server.