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SAP BW needs to materialize data into persistent (regular) tables to be able to access it from multiple session (connections). CGTT and DGTT in Db2 cannot be accessed from multiple sessions/connections. Therefore those temp tables that don't requi...
Although the feature was enabled by mimicking a sysplex,, it is impossible to apply in the real world.The first reason is that the performance overhead is too much when switching from the not shared state to the shared stateSecondly, it is impossi...
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DB2 currently committed semantics available in a pureScale environment
[Background]Customer chose DB2 pureScale as their enterprise-level integrated database and is building four members and two CFs as their pureScale environment. The important keys DB2 pureScale chosen by customer are : - flexible application workl...
pureScale load completion stage is very slow with range partitioned table
pureScale load of partition table is very slow at load completion stage, because db2 will purge local bufferpool for every partition of the table being loaded. ESE improved performance by purging once for all partitions. we wish this improvement i...
The option ordinality is used in XML queries but the overall performance is very slow
We use the for ordinality option in our queries but the over all performance is very poor.There is a specific XSCAN needed when ordinality is specified which takes a long time.this XSCAN produces a sequence of XML ELEMENTS. This sequence is then f...
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