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Auto-reorg should use online window to issue REORG CLEANUP OVERFLOWS (and also trigger a RUNSTATS afterwards).Problem to solve: SQL optimizer thinks overflow accesses are quite expensive and then might to start choosing different access plans that...
Performance penalty in LOAD when using large bufferpool
LOAD RESETDICTIONARYONLY and other LOADs take very long, if table resides in large buffer.The limitation also applies to LOAD on row based tables, but bufferpools on BLU systems tend to be much larger.
The new syntax IF EXISTS for CREATE and DROP TABLES (see https://ibm-data-and-ai.ideas.aha.io/ideas/DB24LUW-I-259) should also be generated by db2look on demand. This would help and simplify migration scenarios with db2look.
This should also be a...
Enable 'db2move' to change definitions during COPY SCHEMA
Using a list of schemas with db2move COPY schema function allows to copy a database content including function and procedure definitions from one database to another,And in the default mode "DDL_AND_LOAD", it copies definitions and loads data usin...
Case TS000932532 - Load should be able to bypass a GENERATED-ALWAYS-from-variable column
ProblemA load on a table containing a certain type of GENERATED ALWAYS column fails with the very odd message "Unexpected load gencol section".Research pointed out that LOAD cannot handle in any way a GENERATED ALWAYS column getting its informatio...
LOAD should allow collecting STATISTICS without USE PROFILE option for row based tables
LOAD collects "default" statistics like auto-runstats when loading into BLU (RUNSTATS ... WITH DISTRIBUTION AND SAMPLED DETAILED INDEXES ALL).I assume this got not changed because the fear of incompatibility with existing behavior. Therefore pleas...
Db2 load ALLOW READ ACCESS support for column organized table
Currently, if a db2 load is happening on a column organized table, users are NOT able to read the data from same table until the load is finished. It's inconvenience for the customer and its users in their daily operation. Thus, the customer wants...
Redesign of cleanup on remote cursor load of LOB data
Customer migrated from DB2 9.1 on Solaris to DB2 9.7 onLinux. As restore is not supported between different endianarchitecture, load by remote cursor was used for datamovement. There was one single table storing about 400 GB ofLOB data (BLOB), tot...
When troubleshooting performance issues on tables with a high number of indexes, the db2advis tool kind of falls flat. What we have done to get around this is to restore a backup of the database in question, drop all indexes, and then run the db2a...
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