Abstract: This version 2 document is a complete replacement of the original Flash. The material in this document has also been incorporated into the z/OS 1.9 Setting Up A Sysplex Product Manual.
z/OS 1.2 introduces a new algorithm for determining whether or not it is more efficient to issue a command to the coupling facility synchronously or asynchronously. Based on the configuration and workload, some parallel sysplexes may experience a significant change in the reporting of activity to some structures in the Coupling Facility RMF report. This flash discusses the value of the new algorithm and the type of changes in the reports one may experience.