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overrule the automatic CPU parallelism calculation of LOAD apart from command line
LOAD does an automatic CPU parallelism calculation, if not explicitly specified in the command by the user.To gain max performance, LOAD assumes, it is the only LOAD (and only application) running on the system and consumes nearly all available CP...
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...
Preserve table creation timestamp after reorg-finsished using admin_move_table procedure (online table move)
Following Knowledge Center, https://www.ibm.com/support/knowledgecenter/en/SSEPGG_10.5.0/com.ibm.db2.luw.admin.perf.doc/doc/c0024850.htmlwe perform table reorg using admin_move_table . The issue is, after run admin_move_table command, the original...
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...
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...
LOAD is today a single transaction. It does not create much log volume, but LOAD might run long if lots of data need to be loaded. This can lead to log full disk situation, if concurrent transactions create a large log volume.The extent allocation...
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.
Reduce size of LOAD COPY dataset for tables with LOBs and XML
A LOAD COPY where the table being acted on has one or more LOB columns is much larger than the original data / final table size / post load backup. From investigation it is based on the pagesize and extentsize of the underlying tablespace. This pr...
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