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Db2 for z/OS

Showing 22

Enhance DSNT375I deadlock message to include DRP global variable use

Following the introduction of the CURRENT LOCK TIMEOUT (CLT) special register and DEADLOCK_RESOLUTION_PRIORITY (DRP) global variable with EPIC 8876, the DSNT376I timeout message has been enhanced to show the timeout values used for both requester ...
over 2 years ago in Db2 for z/OS 1 Planned for future release

Removed object types after Db2 13

At IDUG in Valencia Haakon Roberts informed us that some object types and a few other things has to be removed before we can go to the version after Db2 13. These are Simple tablespaces Segmented Tablespaces Classic partitioned tablespaces Basic (...
9 months ago in Db2 for z/OS 0 Planned for future release

Usage of Reoptimization for remote applications with DB2 Profiles

In many access path issues for applications with remote dynamic SQL statements reoptimization techniques (similar to the REOPT(ONCE/AUTO/ALWAYS) BIND Option for Db2 packages) controlled by Db2 profiles should be a performance benefit
5 months ago in Db2 for z/OS 0 Planned for future release

Data Studio does not support IPV6 addressing

Currently Data Studio does not support IPV6 addressing. We are now running with IPV4 and that works fine but are now testing IPV6 for future use. Data Server Manager does work with IPV6 and Data Studio should as well. We tested with 6 part address...
almost 6 years ago in Db2 for z/OS 2 Planned for future release

Improve INDOUBT thread processing in two-phase commit scenario

Recently we had a pretty severe production outage on an 8-way data sharing group. After resolution of the root cause, WAS and Db2 z were quite slow in recovery. Following the crash, there were dozens of indoubt threads and lots of retained locks a...
almost 2 years ago in Db2 for z/OS 0 Planned for future release

Allow more granular control over what SQL will result in Statistics Profiles updates

Unnecessary statistics can increase RUNSTATS collection elapsed and CPU time, sometimes exponentially, and impact BIND/PREPARE performance because the optimizer must read in all available statistics to determine what is and is not useful for each ...
about 2 years ago in Db2 for z/OS 0 Planned for future release

add SPACENAM in DISPLAY BLOCKERS command

PTF UI69433 introduces a new command DISPLAY BLOCKERS which is wonderful because it provides rich information of locks and claimers. The only draw back is it does not have SPACENAM option to narrow down the output.
about 5 years ago in Db2 for z/OS 1 Planned for future release

RLF DSNRLMTxx table field RLFIP allow subnet wildcard

we have a need to restrict threads with RLF by specifying userid and source IP with a subnet wild card. the source ips change with each "logon". In order to restrict all possible ips under a given subnet, we would need to enter 255 X 255 ips. allo...
almost 4 years 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...
about 7 years ago in Db2 for z/OS 6 Planned for future release

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...
over 4 years ago in Db2 for z/OS 0 Planned for future release

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