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Status Not under consideration
Workspace z/OS
Categories BCP_Supervisor
Created by Guest
Created on Jul 15, 2024

System Recovery Boost SMF record to know how much CPU used in ZIIP instead of GCP

During System Recovery Boost (SRB) some work, that is not eligible for zIIP, is dispatched on zIIP's in case there isn’t sufficient standard CP capacity available.

There is existing SMF to count how much there is zIIP eligible time spent on CP's, for example in the field SMF30_TIME_zIIP_ON_CP. 

But  there is no similar SMF field for the non-zIIP eligible time consumed o standard CP's during the Boost period.

Idea priority Medium
  • Guest
    Reply
    |
    Sep 30, 2024
    .It is true that there is no such information captured by the system. It is not felt that there is sufficient reason to capture such information, as doing so would have negative performance consequences and there is not a need to capture it for billing purposes. It is not correct that work is run on a zIIP "in case there isn.t sufficient standard CP capacity available". CP capacity is not the major factor in deciding whether to use a zIIP for boost processing. This item is unlikely to be given high enough priority to be placed into the product plan
  • Guest
    Reply
    |
    Jul 15, 2024

    I do a mistake, i want to write : But  there is no similar SMF field for the non-zIIP eligible time consumed on ZIIP  during the Boost period.