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Status Not under consideration
Workspace IBM i
Categories Work Management and Messaging
Created by Guest
Created on Feb 23, 2024

RELATED IDEAS

Change ADDWLCGRP "Add Workload Group" to set the processor limit < 1,0

Our customers are using LPARs with less than one CPU assigned. To reduce the impact of ad-hoc queries (e.g. via ODBC) we need to set a CPU limit of the ODBC subsystem. Currently with a workload group we can only set a limit to a whole CPU.

But we need to set a lower limit like 0,2 CPU for the ODBC subsystem. Can the workload group be changed so that a value lower than one CPU can be assigned?

Idea priority Medium
  • Guest
    Reply
    |     Mar 11, 2024

    If I have understood your idea correctly, you can achieve what you want (limiting the maximum impact of ad-hoc ODBC jobs) by using subsystem routing. Whilst this does not place a cap on the processor resource, it does allow you to control the resources associated with these jobs as well as their priority on the system.

    Please take a look at the article below, it gives a good explanation of how to set this up.

    https://powerwire.eu/a-screen-a-story-ibm-i-7-5-set-subsystem-routing/

    I hope this helps.

    Steve Bradshaw
    IBM Champion, Member of CEAC, TD or i-UG.co.uk and Friendly Techie at RowtonIT.com

  • Guest
    Reply
    |     Mar 5, 2024
    We've had this request before, and while I understand the use case and the desire for this function, the current WLC group architecture was never designed to support limits less than a full core. This would require a complete redesign of WLC group architecture from top to bottom. The WLC group design point was to support sub-capacity licensing, and workload management was never really part of the intended use, although it has been used successfully (in some capacity) for this use.

    I am declining at this time because it would require tradeoffs which I do not envision as possible due to its size and complexity in order to fit it into our development plans.

    IBM Power Systems Development

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