December 2002
Intermediate to advanced
542 pages
15h 24m
English
book
Managing OS/400 with Operations Navigator V5R1 Volume I: Overview and More
by Jim Cook, Murtuza Choilawala, Steve Dillen, Stephan Leisse, Dwayne Lindner, Steven Murray, Lindsay Porter, Marios Symeonides
Content preview from Managing OS/400 with Operations Navigator V5R1 Volume I: Overview and More
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5.6. Memory pools
On the iSeries, all main storage can be divided into logical allocations called memory pools. A memory pool can be reserved for processing a job or group of jobs. A subsystem description specifies which memory pool or pools (more than one pool is possible) it uses for jobs managed by that subsystem.
By default, the system (job QFPRADJ) automatically monitors job/thread transitions (switching between using CPU or waiting for a resource or event to occur) and the frequency of times a part of object (program or data) not already in main memory is needed (a “page fault”). In many cases all of this is normal. However, the QPFRADJ job monitors this and makes adjustment automatically as needed.
Though not frequently required, iSeries ...
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