IBM Data and AI Ideas Portal for Customers


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Status Future consideration
Workspace Db2 for z/OS
Created by Guest
Created on Mar 14, 2025

RELATED IDEAS

Need a Db2 option to return control (and not wait) if the maximum number of threads is already reached

We've seen cases in z/OS DFSMS OAM where the application invoking OAM can use up the available Db2 connections/threads so when OAM goes to process their request, there are no longer any threads available resulting in a deadly embrace.  Typically the application will open a thread and process multiple requests under that thread resulting in times, when the threads are not being released in a timely matter.   Today the inbound request to Db2 from OAM gets queued, even thought resources are exhausted by the application invoking OAM.  OAM already has retry logic in place for Db2 reason code F30055 (if the IDBACK limit is reached) which CTHREADS is a part of.  We need an option in Db2, to return a new reason code to us if the number of CTHREADS has been reached and to not queue up our request.  This would enable us to retry our request at an appropriate time and interval so if necessary we can fail the request to the upstream application. 

Needed By Yesterday (Let's go already!)

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