IBM Data Platform Ideas Portal for Customers


This portal is to open public enhancement requests against products and services offered by the IBM Data Platform organization. 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).


Shape the future of IBM!

We invite you to shape the future of IBM, including product roadmaps, by submitting ideas that matter to you the most. Here's how it works:


Search existing ideas

Start by searching and reviewing ideas and requests to enhance a product or service. Take a look at ideas others have posted, and add a comment, vote, or subscribe to updates on them if they matter to you. If you can't find what you are looking for,


Post your ideas

Post ideas and requests to enhance a product or service. Take a look at ideas others have posted and upvote them if they matter to you,

  1. Post an idea

  2. Upvote ideas that matter most to you

  3. Get feedback from the IBM team to refine your idea


Specific links you will want to bookmark for future use

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.

IBM Unified Ideas Portal (https://ideas.ibm.com) - Use this site to view all of your ideas, create new ideas for any IBM product, or search for ideas across all of IBM.

ideasibm@us.ibm.com - Use this email to suggest enhancements to the Ideas process or request help from IBM for submitting your Ideas.

IBM Employees should enter Ideas at https://ideas.ibm.com



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Status Under review
Workspace Data Replication: Change Data Capture
Created by Guest
Created on May 27, 2026

RELATED IDEAS

Upgrade DB2 z/OS native capture engine from 31‑bit to 64‑bit to lift below‑the‑bar storage limits

Problem statement  Log cache is hitting the below‑the‑bar storage ceiling because the current 31‑bit (16 MiB – 2 GiB) address space limits the amount of data that can reside in L1/L2 cache. This runs the risk of a cache spill and degrades CDC latency.

Proposed solution Migrate the program to a 64‑bit address space (2 GiB – 16 EB) so it can address the expanded L2 cache on z/OS  Z16 & Z17. This will allow the application to use the full L1 cache, the larger L2 cache, and raise the below‑the‑bar storage ceiling.

Benefits / impact

  • Reduces cache‑spill frequency → lower CDC latency
  • Increases usable below‑the‑bar storage → supports larger subscription sets
  • Leverages Z17 hardware capabilities → future‑proofs the solution

Success metrics

  • Cache‑spill events per hour
  • Average CDC latency
  • Below‑the‑bar storage utilization before and after the migration
Needed By Quarter

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