538 WebSphere Application Server V8.5 Concepts, Planning, and Design Guide
For more information, see the Websphere Application Server V8.5 Information Center at:
http://www14.software.ibm.com/webapp/wsbroker/redirect?version=phil&product=was-nd
-zos&topic=trun_wlm_tclass
16.4.4 Address space identifier reuse
Address space identifier (ASID) reuse is an operating system function that was introduced
with z/OS V1.9. This function allows the reuse of an address space ID that could not be
reused in earlier releases of z/OS. These IDs include ones that are associated with
cross-process services such as TCP/IP. Starting with V6.1, WebSphere Application Server for
z/OS can use this function, allowing the reuse of the ASID for terminated control regions ...