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Status Future consideration
Workspace IBM i
Created by Guest
Created on Jun 16, 2019

Change the performance adjuster algorithm

The performance adjuster algorithm looks only if the pool is paging but doesn't care if it has already free memory. This causes sometimes that a pool start stealing a lot of memory without using it. The algorithm should look at the unallocated memory in that pool to determine if it needs to keep adding memory.


Use Case:

Many customers needs to turn off Performance Adjuster because some jobs page a lot but they are not using the memory (e.g. interactive jobs or qzrcsrvs prestart jobs).


Idea priority High
  • Guest
    Sep 17, 2021

    We still agree this is an important request are hoping to make some improvements.

  • Guest
    Dec 4, 2020

    We are still hoping to makes some changes to the QPFRADJ algorithm to use the unallocated pages count more extensively in a future release.

  • Guest
    Oct 30, 2019

    Due to processing by IBM, this request was reassigned to have the following updated attributes:
    Brand - Servers and Systems Software
    Product family - Power Systems
    Product - IBM i
    Component - Work Management and Messaging
    Operating system - IBM i
    Source - None

    For recording keeping, the previous attributes were:
    Brand - Servers and Systems Software
    Product family - Power Systems
    Product - IBM i
    Component - Core OS
    Operating system - IBM i
    Source - None

  • Guest
    Aug 6, 2019

    The COMMON Europe Advisory Council (CEAC) has reviewed this requirement and recommends that IBM view this as a medium priority requirement that should be addressed.

    Background: The CEAC members have a broad range of experience in working with small and medium-sized IBM i customers. CEAC has a crucial role in working with IBM i development to help assess the value and impact of individual RFEs on the broader IBM i community and has therefore reviewed your RFE.

    To find out how CEAC help to shape the future of IBM i, see CEAC @ ibm.biz/BdYSYj and the article "The Five Hottest IBM i RFEs Of The Quarter" at ibm.biz/BdYSZT

    Therese Eaton – CEAC Program Manager, IBM