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Search results: Db2 for z/OS

Showing 123 of 1578

support list partitioning - Range-Partitioning allows only to define the upper limit for a partitioned Tablespace.

Full Support for LIST-Partitioning required! With classical Partitioning or UTS Partion-by-Range you can only define the upper limits (key-Ranges) for a partitioned Tablespace. The lower partition-range ist defined by the highest value of the next...
over 12 years ago in Db2 for z/OS 1 Not under consideration

Distributed Thread cancelled due to Idle Thread Timeout or MONITOR IDLE THREADS not writing record to SYS1.LOGREC

We noticed that every DB2 distributed thread that is cancelled because: 1) Idle thread timeout value that is specified by Db2 subsystem parameter IDTHTOIN in macro DSN6FAC is exceeded; or 2) ATTRIBUTE2 value in a row with KEYWORD value MO...
about 4 years ago in Db2 for z/OS 1 Not under consideration
3 MERGED

Set Special Registers with profile tables for local applications

It would be nice to set the current explain mode (special register) with the help of profile tables (dsn_profile_table & dsn_profile_attributes) for local applications. In our case it's CICS. At the moment it's only possible for remote applica...
over 1 year ago in Db2 for z/OS 4

improve documentation about CONDBAT (& MDBAT) and how to watch the limit being approached

The IBM provided documentation for important ZPARM of CONDBAT and MDBAT is a bit vague on exactly what to watch for these important limits. The documentation could be improved. I reviewed the documentation for DISPLAY DDF command https://www.ibm.c...
about 4 years ago in Db2 for z/OS 0 Planned for future release

Improving latch contention in Db2 z/OS

DB2 workloads run at a priority that is related to their origin (may it be batch, IMS, DDF, …) and according to WLM service class definitions. In high system utilization scenarios, or due to workloads running in a WLM service class with a resource...
about 4 years ago in Db2 for z/OS 1 Not under consideration

New Function UNHEX

New Function UNHEX (name subject to change/negotiation) We have a system where all CHAR columns are defined FOR BIT DATA. It seemed genius at the time to save a few bytes of data, not realizing the negative impact in future maintainability and in ...
7 months ago in Db2 for z/OS 3 Not under consideration

Rotate an archive-enabled PBR tablespace without causing a deadlock

When we try to rotate partitions of an archive-enabled PBR tablespace, Db2 requires us to disable archiving before the rotate then re-enable archiving after the rotate. However, when we re-enable archiving we cause a deadlock with CICS and the onl...
almost 3 years ago in Db2 for z/OS 0 Not under consideration

Option to dictate behaviour regarding deadlock victim selected on deadlocks involving DDL ALTERs

In true 24*7 production environments there is an increasing expectation that simple(on the face of it) DDL changes should be able to break-in concurrent with application workload. In the case of high-arrival rate transactions even at the quietest ...
over 4 years ago in Db2 for z/OS 1 Delivered

Meter "dirty" pages written to DB2 table spaces (disk) from CF or local buffer pools

DB2 uses 300 tasks (DB2 writers - it could be more now with later DB2 releases) to write modified (aka, "dirty") pages to the DB2 table spaces (either permanent tables or DB2 work files). From a DB2 perspective this is "efficient" but from a resou...
almost 2 years ago in Db2 for z/OS 4 Not under consideration

Add Bufferpool ID # to SMF 100/2 DNSDQDBP

Hello z/OS DB2, I am processing the SMF 100 subtype 1 and subtype 2 records and match upthe buffer pool data. In the SMF 100/1 DSNDQBST section, the buffer pools are identified by a buffer pool ID number. On the SMF 100/2 records, DNSDQDBP section...
over 6 years ago in Db2 for z/OS 3 Planned for future release

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