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Save and (restore) access plan for dynamic and Statis SQL
Sometime after maintenance, or index/stats change, certain SQL can pick a bad access path. It would be nice to be able to save access path and force db2 to pick old access path. We just had very painful process after V11 migration. When access pat...
Add table function to "pretty print" explained statement
Db2 allows to install the EXPLAIN TABLES using a procedure (https://www.ibm.com/support/knowledgecenter/SSEPGG_11.1.0/com.ibm.db2.luw.admin.explain.doc/doc/t0059594.html)
There are different ways to generate an access plan, i.e., to explain a...
Poor performance on DB2 V11.1 due to changes in build process
Some customers are noticing performance degradations moving from v105 ESE to v111 ESE on the same hardware.These degradations are most pronounced in OLTP workloads, with an emphasis on INSERT and UPDATE operations. Db2 Support has confirmed that t...
ADM7007E - Logging The Process holding the database port when this error is logged in the diag could help us better for RCA
Part of critical Protection mode Restart, TSAMP has issued ipclean where the instance restart was not clean due to the below message in the logs. MESSAGE : ADM7007E The SVCENAME DBM configuration parameter, "50000", is configured with a port or a ...
We cannot view the subordinate logs from parallel container while analyzing the logs in AdminConsole Web-Log-Viewer. (See Case TS000078576) There is no possibility to open this subordinated Log, as the Filename is not clicable. We need it fixed, a...
INSTANCE_MEMORY AUTOMATIC should be automatic, not calculated
The default value of the INSTANCE_MEMORY parameter is AUTOMATIC. The AUTOMATIC setting results in a value that is computed at database partition activation. This behavior is inflexible regarding dynamic memory changes e.g. for AIX LPARs. Today it ...
Add similar feature to DB2 - Oracle Database, Edition Based Redefinition (EBR) feature
Oracle Database has Edition Based Redefinition (EBR) feature to minimize/eliminate downtime through schema versioning. It would be very useful for DB2 to have a similar feature to allow adding or modifying new or existing data structures without d...
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