IBM's virtual storage manager (VSM) handles requests for virtual storage below the 2G "bar". The 64-bit architecture extended the maximum address space size from 2G to 16 exabytes, and RSM manages this expanded virtual space above 2G. While virtual storage constraint relief focuses on removal of pressures on the 2G below the bar, virtual below 2G continues to be premium real estate in an address space. An introduction to the interfaces and tuning knobs for optimum use and management of this virtual storage below 2G is the topic of this presentation. While this presentation focuses on some of the new enhancements in VSM, it is also a good primer on VSM basics, including overviews of the GETMAIN, FREEMAIN, STORAGE and CPOOL macros, Common Storage Tracker, and VSM statements in the DIAGxx member IEASYSxx.
Tracks: Applications Programming, z/OS Systems Programming and zNextGen
