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Need to support inplace reorg on partitioned table with global indexes
This is critical in a 2 sense; 1) Performance The customer has many range-partitioned table with global indexes and most of them left unreorganized because INPLACE REORG on Inplace reorg on range-partitioned table with a global index is not suppo...
https://www.ibm.com/support/knowledgecenter/en/SSEPGG_10.5.0/com.ibm.db2.luw.admin.perf.doc/doc/c0009677.htmlIn a pureScale environment, space that is freed up by a delete transaction on one member may not be reused by an insert transaction on a d...
In current design, when SQL statement accesses a table, the compression and expansion dictionaries of that table will be read into DBHEAP and kept there until database deactivation. For column-based table, the memory consumption may up to 100MB. i...
We would like functional/partial indexes, that is indexes that include a where clause. Currently when there is an index that includes a condition we have to put the condition as part of a field (NAME_IS_BLANK) and then include that conditional fi...
Use FSCR information to ommit empty data pages while performing Table Scan (TBSCAN)
ABSTRACT:Table scan over volatile table with large number of empty pages scans all empty pages instead of using FSCR to find pages to be scanned.VERSION INFORMATION:DB2 9.7.FP5 on Linux / DB2 9.7.FP9a on AIX 7.1 / DB2 10.5.FP4 on LinuxTECHNICAL IN...
Compression of Primary Key Indexes with Version 10.1 FP 5
While doing some testing with, we noticed that when you create a table compressed, that ALL indexes automatically get compressed. We found out that we have the ability to specify "normal" indexes without compression, but you can not have an uncom...
Support synchronous detachment of a table partition
Starting with DB2 9.7(?) the detachment of table partitions is handled asynchonously. To simulate synchronous behaviour a complicated work around has to be put in place. Such a behavior could be triggered by a new DML keyword such as ASYNC.
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