Leveraging Virtual Storage Manager and Large Pages

Project and Program: MVS, MVS Core Technologies

Tags: Proceedings, SHARE Providence 2017, 2017

The 64-bit architecture extended the maximum address space size from 2G to 16 exabytes.  However, 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. IBM's virtual storage manager (VSM) handles requests for virtual storage below the 2G "bar". While this presentation focuses on some of the new enhancements in VSM, including large pages, it is also a good primer on VSM basics, including overviews of the GETMAIN, FREEMAIN, STORAGE and CPOOL macros, Common Storage Tracker, Health Checks, and VSM statements in the DIAGxx parmlib member.-Steve Partlow-IBM

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