March 2007
Beginner
526 pages
13h 53m
English
book
Introduction to the New Mainframe: z/VSE Basics
by Wolfgang Bosch, Hans Joachim Ebert, Helmut Hellner, G. M. (Jerry) Johnston, Wilhelm Mild, Ingolf Salm, Joerg Schmidbauer, Martin Walbruehl, Mike Ebbers
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86 Introduction to the New Mainframe: z/VSE Basics
In addition, virtual storage management services for the z/OS macros keep track
of the map of virtual storage for each address space. In so doing, it sees an
address space as a collection of 256
subpools, which are logically related areas
of virtual storage identified by the numbers 0 to 255. Being logically related
means that the storage areas within a subpool share characteristics such as:
Storage protect key
Whether they are fetch protected or pageable
Where they must reside in virtual storage (above or below 16 megabytes)
Whether they can be shared by more than one task
Some subpools ...
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