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Removal of an unnecesary system crash due to must-complete or latch holding agent - RC 00F3040A
Today, there is an intentional system crash designed and exploited with an abend code 00F3040A when an agent abending in system is in so called must-complete state or is holding a latch. We have been running a case TS006198341 where our system cra...
about 2 months ago
in Db2 for z/OS
Not under consideration
Global Variables: A global variable can be created with a default value. Each session that uses it will then instantiate a version of that global variable, with the default value and any change in the value is limited in scope to its unit-of-work....
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 MONITOR...
LOAD utility by pass checking pending status for empty tables
When LOAD utility is run on a referentially integrated table (child table) while both parent and child tables are empty (no rows) let DB2 refer to RTS data and decide NOT to put the table in CHECK PENDING status.
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 ...
Please reference CASE TS005056787 (Temporal Table access path in Plan_Table does not match dynamic explain). This bind option which is set for using a Temporal Timestamp Register was set with a DEFAULT to YES by IBM for all binds that exclude thi...
Full Column Match and I1 Access on SQL with Correlated Sub-Queries Containing Column Expressions and Supporting IoE
Some queries with column expressions - DATE(A1.EFCTV_TS) <= DATE('04/05/2020') for example, and an Index on Expression to support the expression are achieving I1 access while others are not. It appears this is because of how the query is curre...
With the implementation of transactions with persistent threads (like pseudo wait-for-input on IMS) we have been facing some concurrency issues in our site, specially with HPU and batch programs that perform lock escalation. This happens because t...
Add more granularity to commands -START PROFILE and -STOP PROFILE
Summary: Enable a new keyword PROFILEID(list-of-profile-IDs) for the -START PROFILE and -STOP PROFILE commands.----Currently, the activation of profiles can be performed by a -START PROFILE command, which in turn activates all profiles that have S...
almost 3 years ago
in Db2 for z/OS
Not under consideration
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