IBM Data and AI Ideas Portal for Customers
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Is there any feedback?
kind regards
Norbert Wolf
DATEV eG
Hello Norbert, I am checking with development and will post an update when I receive their feedback.
Sincerely,
The Db2 for z/OS team
Hello,
I regularly, at least annually, check the status of my ideas. There are more than 30 votes for this idea. So it seems to be relevant for many customers. Even under V13 there is probably no solution to this. What is IBM planning to improve the problem described?
Hello Janet,
Our management expects us to be able to roll out "simple ALTERs (ALTER TABLE ADD COLUMN)" with virtually no interruptions. In some cases, we have technical DBDs in the background that are made up of many objects. In a scenario with predominantly dynamic SQL, the small ALTER TABLE ADD COLUMN change can then lead to disruptions/hinders to the applications. We can therefore not promise our management that such small changes (ALTER TABLE ADD COLUMN) will be uninterrupted.
Hello Norbert, We would like to understand the scenarios a bit better. Can you update this idea with more details about the circumstances when DBD lock contention is seen?
Thank you,
The Db2 for z/OS team
Hello,
please can you give us an update for the status of that idea? Is there something in DB2 V13 that helps in this area
We also see an increase in DBD contention. We started using CLONE tables in combination with LOAD REPLACE. We found out the hard way that the conflict on the DBD Lock, although understandable, not desirable! We now have to schedule the LOAD DATA and EXCHANGE DATA job in sequence whereas we would like to run them in parallel to improve availability of the VIEWs with UNION dependent on the tables loaded. So, a better, meaning less restricted way of handling DBD locks would be highly appreciated. We also fear that with the increasing CI/CD pipelines coming to Db2 z/OS this problem will increase as well.
Hello Norbert,
Thanks for the follow up. It's no surprise that reducing DBD contention would be a popular item. Unfortunately that does not make it any easier to do. This requirement is marked for future consideration because we have a keen interest in reducing the impact of schema changes upon the system and other application threads in particular and we continue to make progress in this area. At this point though we do not have a concrete design or roadmap in place for improving the granularity of DBDs or DBD locks. If and when that changes we will update this.
Sincerely,
Db2 for z/OS Development
Hello,
do you have any current plannings for that idea? Please can you give us an update for the status of that idea? I see 29 votes for that idea now and I think that this shows the relevance of that problem
kind regards
Norbert Wolf
Datev eG
Hello,
do you have any current plannings for that idea? Please can you give us an update for the status of that idea?
kind regards
Norbert Wolf
DATEV eG
Hello, please can you give us an update for the status of that idea?
Dear all, we've recently opened a similar idea related by the excessive DDL Locks acquisitions but on a static SQL scenario. Please vote it if you agree, https://ibm-data-and-ai.ideas.aha.io/ideas/DB24ZOS-I-1114 .