IBM Data and AI Ideas Portal for Customers


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Db2 for z/OS

Showing 789

Make product manuals available in ePub format.

Can you please make more product manuals (specifically DB2 for z/OS) available in the ePub format? The PDF format does not work well with tablets and readers. If you zoom to get a legible font size, then you must scroll left, right, left, right on...
over 4 years ago in Db2 for z/OS 1 Not under consideration

Improve DB2 sliding scale algorithm (SECQTY -1)

The maximum secondary space allocation of 559 cylinders for objects of 64GB or greater is too little causing the number of extents hits the limit of 255 or if using Extent Constraint Removal it would generated many extents. For the cases where the...
about 3 years ago in Db2 for z/OS 1 Not under consideration

additional Db2 accounting info when SELECT FROM FINAL TABLE is used

When I use SQL UPDATE then the accounting information is very clear that UPDATE was used. If I wrap that UPDATE with SELECT FROM FINAL TABLE on the outside then the accounting information does not clearly show UPDATE was used. This is tricky and a...
about 3 years ago in Db2 for z/OS 1 Not under consideration

DB2 DSNTIJPM catmaint update

The pre migration job DSNTIJPM should check for catalog integrity As far as i can count we have got 11 special catmaint update PTF's with hold data in V 10 the DSNTIJPM job should check if all this special caytmaint updates have been solved before...
over 9 years ago in Db2 for z/OS 1 Not under consideration

Native SQL Stored Procedure Maintenance Is Invalidating Dependent Packages

For DB2 V10 and V11. When any of following 3 things are done against a NSP (Native SQL Stored Procedure)1. Alter to Activate a version2. Bind Deploy Action(Replace)3. Alter RegenerateAll the packages dependent on the NSP are being invalidated and ...
over 9 years ago in Db2 for z/OS 1 Not under consideration

Add SHADOW for REBUILD INDEX SHRLVE CHANGE

Differences between REBUILD INDEX SHRLEVEL CHANGE and REFERENCE. Reference PMR:13307,124,672
almost 5 years ago in Db2 for z/OS 0 Not under consideration

RECOVER to A MIGRATED FLASHCOPY

We are in DB2 V10.We recovered a tablespace to a flashcopy. The flashcopy was migrated via HSM and the recover skipped to a previous copy (not migrated). The job returned return code = 04 with the message FLASHCOPY ....... FOR TABLESPACE DBHWCOPY....
about 8 years ago in Db2 for z/OS 1 Not under consideration

Enable RENAME TABLE on tables with triggers

SAP is working on enable the Zero Downtime solution (ZDO), which uses RENAME TABLE to switch between old and new table definitions, also for SAP systems that use a sidecar (SAP SLT - System Landscape Transformation). For SLT, SAP defines triggers ...
over 6 years ago in Db2 for z/OS 1 Not under consideration

Lock hashing algorithms of DB2 and XES are incompatible. Leads to excessive False Contention and high IRLM CPU for GLM xfer

There is an anomaly between DB2 and XES hashing algorithms which means that a 4-byte DB2 (unique) lock hash value passed to XES may not be hashed to a unique value by XES unless the LTE size is set excessively high (1G). I understand that DB2 hash...
about 8 years ago in Db2 for z/OS 1 Not under consideration

UNION should automatically be rewritten to "UNION ALL" when it is logically equivalent

In the following query, the developer coded "UNION". Because it is part of a "WHERE EXISTS" subselect, replacing the UNION with "UNION ALL" will perform much better and deliver the same results: SELECT * FROM PDBR111.VCLI095_SELECT V01WHERE V01.A...
almost 5 years ago in Db2 for z/OS 1 Not under consideration

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