I'd say it depends on your workload :-)  

If you are doing I/O that could be avoided with more buffers, it would be used. 
 Sort might be able to use it, if you sort much.  

I once did amazing things increasing CICS temp storage buffers :-)

Len Rugen

University of Missouri
Division of Information Technology
Systems & Operations - Metrics & Automation Team

________________________________________
From: IBM Mainframe Discussion List [IBM-MAIN@LISTSERV.UA.EDU] on behalf of 
phil yogendran [philyo...@gmail.com]
Sent: Friday, February 12, 2016 4:07 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Real Storage Allocation

Hello,

Is there a downside to over-allocating real storage on an LPAR?

We will be upgrading current processors which are tired and soon to be out
of service to z13's which will have 4 times the storage we have at present.

We don't have any issues with paging or UIC etc. but I feel that on the new
processors, I need to make use of most if not all that available storage.

Some of my thoughts are;

- Will the additional storage be used on an LPAR which already has enough
to do it's work.
- Is there a way to monitor for 'unused' storage?
- If the storage is not used, is there a loss of cycles in an 'overhead' to
managing this unused storage?
- etc.

Your comments will be appreciated.

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