IBM Data and AI Ideas Portal for Customers


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Db2 for z/OS

Showing 984 of 15517

Request for improvement in IRLM during crash of DB2

Last weekend, we had the incident described in cases TS015424759 and TS015422058 in which an HPU job that went out of memory while having a latch holded causing DB2 outage. This caused a major business impact because the IRLM did not crash and lef...
10 months ago in Db2 for z/OS 0 Planned for future release

SQLCODE -20528 SQLCODE20528N

CCB occasionally received SQLCODE -20528. As stated in DB2 CODES manual, this can occur while two transactions trying to update a row in system-period temporal table closely. A row being moved to history table can have sys_start higher than sys_en...
over 6 years ago in Db2 for z/OS 6 Planned for future release

Math function changes in Db2 12

POWER Built-in function got rewritten and so I am hoping to get a list of all changed built-in functions in Db2 12 so that I can do better testing before going into production.
about 7 years ago in Db2 for z/OS 0 Not under consideration

Object should go into advisory reorg when PCTFREE, PCTFREE for update, FREEPAGE is altered instead of immediate alter to have the REORG pick it up and ensure it is done. Having it immediate is just a catalog update and it might be missed.

When Altering PCTFREE, PCTFREE for UPDATE or FREEPAGE, the DB2 catalog is updated and the DBA must ensure a reorg is run to materialize the change. A process that can be missed. I would like to see this as a pending change and have the reorg pick ...
almost 4 years ago in Db2 for z/OS 1 Not under consideration

Identify when all members of a Data Sharing Group are up and operational

After a crash or hard down, Db2 will perform its recovery processing including GRECP and LPL processing. There are external systems (e.g. CICS, MQ, etc.) that are dependent on all members in the data-sharing group to be fully up and operational an...
about 1 year ago in Db2 for z/OS 1 Not under consideration

Link FLA messages to auto recovery task id

We did a large GRECP recovery test with around 68.000 GBP dependend objects. After restart and the automatic GRECP recovery we see a lot of DSNI025I, DSNI026I, DSNI027I, DSNI028I and DSNI029I messages as expected, but they have no correlation to t...
about 1 year ago in Db2 for z/OS 0 Future consideration

IFCID 366/376: include SQL text in the trace records

The analysis of IFCID 366/376 is done via SMF records. When these records are available (one day delay), it is nearly impossible to match the statement ID to a statement in dynamic statement cache, because the statement might be already discarded....
about 6 years ago in Db2 for z/OS 1 Not under consideration

REORG TABLESPACE REBALANCE option to leave some partitions empty

The current REORG TABLESPACE utility with REBALANCE option will distribute rows evenly accross partitions. Many of my tables have ascending keys, so after a REBALANCE of several partitions (example PART(10:16) ), most new rows will be inserted int...
about 5 years ago in Db2 for z/OS 0 Not under consideration

Lock escalation on HISTORY STATISTICS catalog tables for DROP statement

add the ability for lock escalation on the catalog tables which contains the HISTORICAL STATISTISCs data (SYSIBM.SYS...HIST)
over 12 years ago in Db2 for z/OS 1 Not under consideration

Changing partitioning key columns

Most of our tables that are created before DB2 V8 (and even some created later than that) uses the primary key as the partitioning key. The resulting partitioning key therefore consists of many columns, but the significant columns for partitioning...
about 12 years ago in Db2 for z/OS 1 Not under consideration

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