IBM Data and AI Ideas Portal for Customers


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Db2 for z/OS

Showing 798

I would like an easy way to validate that a bound query is used to hint a dynamic query

Today, it is easy to validate that a bound query is used as a hint to a static query. After all, there is a column updated in PLAN_TABLE when the package is bound that exploits the bound query. But, it becomes difficult to know if a dynamic query ...
almost 5 years ago in Db2 for z/OS 1 Not under consideration

DSNACCOX RRTDataSpaceRatio & TSQTY ZPARM

Our DBAs would like to use the RRTDataSpaceRatio attribute via DSNACCOX stored procedure to facilitate triggering REORGs for over allocated tablespaces. This is not currently possible due to the fact that REORGs are triggered erroneously for small...
over 9 years ago in Db2 for z/OS 4 Not under consideration

RUNSTATS DIRECTORY (DSNDB01) TABLESPACES

Till now (DB2 12) it is not allowed to run RUNSTATS on the directory tablespaces.Because of features like LOB COMPRESSION or SPT01 COMPRESSION it is strongly recommended to have the possibility to run RUNSTATS on the directory tablespaces. We have...
almost 8 years ago in Db2 for z/OS 1 Not under consideration

IFCID 172/196 (Deadlock/Timeout) – Add STCK for Held Locks

At IFCID 172/196 (Deadlock/Timestamp) please add a STCK for the held lock (blocker) when the lock was granted. In case of a lockout with this STCK the sequence of the locks, and so the sequence of the blocker-SQLs, can be reconstructed ‘post mor...
over 11 years ago in Db2 for z/OS 1 Not under consideration

Improved granularity for WITH clause

GGDB210017 Implement WITH clause syntax as a sub-clause for JOIN specification
about 12 years ago in Db2 for z/OS 1 Not under consideration

Externalize DDF Alias level statistics into SMF

Currently we do have SMF data for DB2 system level distributed workload but do not have DDF Alias level statistics with in SMF, only available adhoc option is to issue DIS DDF <alias> DETAIL to look at DDF alias level active dbats and connec...
7 months ago in Db2 for z/OS 1 Not under consideration

User interface to provide correlation between Db2 packages and load module

Pain Point: Housekeeping of Db2 packages (deletion of old, no longer needed application packages) is done subsequently to the houskeeping of the corresponding load modules on the loadmod. Today we use the contoken to correlate the load module with...
almost 5 years ago in Db2 for z/OS 2 Not under consideration

Use Limitkeys as histogram-stats, if appropriate

Recently we had a Performance Problem where I was requested to collect histogram-stats for a column, which matches the partitioning column. Because this was a big table, running this runstats took about 9 hours to complete. If limitkeys could serv...
over 8 years ago in Db2 for z/OS 2 Not under consideration

Create a new partition if a LOB-tablespace gets a new partition in a UTS PBG

Hi Sometime the base-table is very small whereas the corresponding lob-tablespace can get bigger and bigger. So the base tablespace remains at one partition whereas the log tablespace can run against the limit of 255 datasets
over 6 years ago in Db2 for z/OS 1 Not under consideration

DB2 - ALTER TABLE ROTATE

Auslöser :PMR 28789The deadlock occurs between the ALTER TABLE ROTATE FIRST TO LAST, which invalidates pkg dependent on the table and triggers an auto rebind ( Thealter table process obtained a row lock on SYSTSTAB and waiting for row lock on SYS...
almost 7 years ago in Db2 for z/OS 0 Not under consideration

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