IBM Z Hardware and Operating Systems Ideas Portal


This is the public portal for all IBM Z Hardware and Operating System related offerings. To view all of your ideas submitted to IBM, create and manage groups of Ideas, or create an idea explicitly set to be either visible by all (public) or visible only to you and IBM (private), use the IBM Unified Ideas Portal (https://ideas.ibm.com).


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Welcome to the IBM Ideas Portal (https://www.ibm.com/ideas) - Use this site to find out additional information and details about the IBM Ideas process and statuses.

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Status Delivered
Workspace z/VM
Created by Guest
Created on Nov 20, 2018

RELATED IDEAS

Reduction CPU cost for Set Rdev command of z/VM

zLinux on z / VM is running integrated DB server with 24 x 365. When adding DASD etc., I use dynamic I / O Reconfig function.
In order to connect the new DASD to the z / VM system running at 24 x 365 and recognize it, the SET RDEV command is executed with the range specification. When the range width is large, the CPU overhead increases extremely. Increasing the load of the SET RDEV command becomes a problem when this SET RDEV command is executed with high CPU load.
In order to reduce the CPU overhead, control such as serializing processing or designating priority of processing can be performed.

Idea priority Medium
  • Guest
    Reply
    |     Aug 18, 2020

    Available with APAR VM65730

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