March 2003
Intermediate to advanced
282 pages
9h 13m
English
book
IMS in the Parallel Sysplex Volume I: Reviewing the IMSplex Technology
by Jouko Jantti, Juan Jesœs Iniesta Mart’nez, Knut Kubein, Bill Stillwell, Gary Wicks
Content preview from IMS in the Parallel Sysplex Volume I: Reviewing the IMSplex Technology
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Chapter 5. IMS shared queues 115
5.6.2 Overflow processing
When the overflow threshold is exceeded and the overflow structure is defined, structure
activity is quiesced while the queue names that are using the largest number of data
elements are identified. The identified queues are moved to the overflow structure until the
data element usage drops by a minimum of 20%. The moving of one large queue could result
in the drop being far greater than 20%. A queue cannot exist in both the primary structure and
the overflow structure. If a queue is selected to be moved, the whole queue is moved from the
primary structure to the overflow structure. ...
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