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Improve performance of queries with correlated subqueries in IDAA v7
Queries with correlated sub-queries where index access is involved will generally run faster on Db2z then on IDAA v7. Since IDAA v7 supports correlated subqueries, these queries are generally offloaded to IDAA, although they may run significantly ...
Add the accelerator name in the DISPLAY STATS(LRT) cmd
Hello, When there is more than one accelerator that using Integrated Synchronization, The DISPLAY STATS(LRT) command displays the details for each SESSION ID without the accelerator name. #Db2 for z/OS Best Regards, Ron Hameiri
setup limitations on cpu, memory, workspace and elapstime
Hi, when migrating from Netezza to the new IDAA appliances (Db2 Blue), we saw a lot of new issues popping up. One major issue that is still not solved in v7.5.3, is that we experience a lot of very long running queries in the appliance. Sometimes ...
Today, V7 container code for both IIAS and Z are downloaded from Fix Central. It is a different download and website than normal Stored Procedure and other Db2 related maintenance PTFs. Some customers have download issues such as download runs for...
We have processes that make a lot of MULTI ROW INSERT into AOT.We are not using in this cases the Db2 Analytics Accelerator Loader because the data is processed in other platforms and others utilities and we want to insert it when we have the data...
Log message in case of threshold reached Appliance Data Pool
At one time our Appliance Data Pool was 78% used. Several users faced -904 message without any extra information. They got this message when running Queries with a lot of output (multiple Gb´s).....we saw that the reason was in the area of the spi...
QUERY_ACCEL_OPTIONS (option 11), add V5 ONLY option
As documented below, QUERY_ACCEL_OPTIONS (option 11) provides two options only. Simply (for all accelerators) or (V7 only). Especially, for migrations projects from V5 to V7, if we had third option such as (V5 Only), this would secure the workload...
All accelerated tables should have LASTUSED information. The Lastused information enables: 1) Removal of tables not used. 2) Avoid unnessecerary loads of tables 3) Frees up space on Accelerator 4) Reduces accelerator table maintenance 5) Removes o...
Enable Alter Key for HPSS Archive on Partition Level
With IIAS 7.5.2 a new HPSS function was enabled . This function is the option to change the Organizing Key of an already archived table using ALTER KEYS. Although this improves our current situation the drawback of this solution is that ALTER KEYS...
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