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Status Not under consideration
Workspace Db2 for z/OS
Created by Guest
Created on Feb 7, 2024

Allow reset of all High Water Mark Statistics values

Currently some statistics HWM values are not reset while Db2 is active - e.g. Q3STCTHW.  Consequently a transient event can hide a long term situation.

This idea would allow those statistics to be re-set to zero - allowing performance management to identify long-ish term trends without a sudden event hiding them.

It could be implemented by a command or a zparm to reset the value at some specified interval.

 

Needed By Not sure -- Just thought it was cool
  • Admin
    Janet Figone
    Reply
    |
    May 7, 2024

    Dear James,

    Thank you for submitting this Db2 for z/OS enhancement request. Our Db2 for z/OS develpoment team gave this idea a comprehensive review, and determined it is a good idea, however, there is a very high implementation cost to this idea. Consequently, we will not be considering this idea.

    We appreciate your input to the Db2 for z/OS development team. We also hope that you will continue to submit ideas for improvements as customer feedback is a key component to shaping the future direction of Db2 for z/OS.

    Sincerely,

    Db2 for z/OS Team

  • Guest
    Reply
    |
    Mar 20, 2024

    I like this idea. Normally the only way to reset HWMs is to cycle the subsystem.


    The command would work Something like:

    -MODIFY STATS RESET(THREADS) would zero the Q3ST thread HWMs

    -MODIFY STATS RESET(DATASETS) would zero the DSMAX HWM in QTST blocks

    -MODIFY STATS RESET(ALL) would reset all eligible HWM fields

    Etc...