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Status Not under consideration
Created by Guest
Created on Aug 22, 2024
Merged idea
This idea has been merged into another idea. To comment or vote on this idea, please visit MESNS-I-670 MQ on z/OS-Extend Maximum Pageset size to more than 64GB.

Provide support for MQ for z/OS Pagesets greater than 64GB Merged

There are "growing" reasons why this is becoming necessary.  Everything is growing.   Message sizes are getting bigger. Data in general is getting bigger. Message volume is getting higher.  Specifically, the account I work with has an application that puts large messages onto a queue with multiple IMS BMPs on a 24x7 basis, and simultaneously reads them off with multiple Batch started tasks also on a 24x7 basis.  Typically, the Getters keep up with the Putters. Depending on volume, and performance considerations that could be impacting the getters, the queue depth can build quickly on this Queue.  Given the large size of the messages, any significant delay on the getters (or flood from the putters) can result in the Pageset being full in just a couple of hours.  The Pageset is using extended addressability and is fully extended to 64GB.  Unfortunately, 64GB just isn't that much space anymore. 

Maybe a Pageset could be made to use Multiple physical VSAM datasets ?   (I'm thinking along the lines of how DB2 LOB Tablespaces work).

Idea priority Medium