IBM Data and AI Ideas Portal for Customers


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BLU Acceleration

Showing 33

Excessive DBHEAP by BLU compression dictionaries

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...
about 8 years ago in Db2 / BLU Acceleration / Tables/Index (Range MQ MDC etc.) 1 Not under consideration

Trigger support for BLU tables

Trigger support is part of many replication technologies e.g.- ADMIN_MOVE_TABLE- trigger based Qrep- SAP zero downtime upgrade
over 6 years ago in Db2 / BLU Acceleration 0 Not under consideration

Detect corrupted synopsis tables online

There is a need to report all corrupted synopsis tables online. Currently, db2dart /crs can do it per table and it's done offline.
over 5 years ago in Db2 / BLU Acceleration / Tables/Index (Range MQ MDC etc.) / Utilities (Export Import Load db2look etc) 0 Not under consideration

DB2 BLU Acceleration in DB2 pureScale

Wewould like to see DB2 BLU acceleration on a DB2 pureScale cluster.
over 7 years ago in Db2 / BLU Acceleration 0 Not under consideration

Section actuals for BLU

Collecting section actuals and compare it with the SQL compiler estimates using the db2caem tool is quite handy to find cardinality mis-estimates in huge plans.
over 6 years ago in Db2 / BLU Acceleration 0 Not under consideration

Avoid SQL0955C Sort memory cannot be allocated to process the statement. Reason code = 3

It would avoid Db2 errors and interruptions. Every customer using Db2 BLU who ran (or will run) into SQL0955 RC3 errors would benefit.
over 4 years ago in Db2 / BLU Acceleration 0 Not under consideration

System maintained MQTs for BLU MPP

We use DB2 v10.5 DPF for a Warehouse Environment (40TB Data, ~9000 Users, 40 Tsd. Reports per day). We want to migrate the database to DB2 v11.1.1.1 BLU MPP with all tables column oriented. In this case we have checked the functionality for system...
almost 8 years ago in Db2 / BLU Acceleration 0 Not under consideration

ALTER TABLE LOCKSIZE TABLE for BLU tables

ALTER TABLE LOCKSIZE TABLE is an easy way to save lock list and lock acquire for tables that just get accessed by a single application at a given time.
over 6 years ago in Db2 / BLU Acceleration 0 Not under consideration

Estimate the optimal BLU columnar compression rate by sampling data

A technique is needed to determine optimal data compression rates for BLU columnar tables. Such a utility should estimate the optimal compression rate without and with the new string compression enhancements delivered in Db2 11.5 code stream. In e...
over 1 year ago in Db2 / BLU Acceleration 1 Functionality already exists

Create User Temporary Tables in round robin

Assuming that there is more than one temp tablespace with the same page size and 'IN TABLESPACE' clause is not specified in the DECLARE GLOBAL TEMPORARY TABLE command, then DB2 optimizer should allocate the temp tables across all temporary tablesp...
almost 6 years ago in Db2 / BLU Acceleration 0 Not under consideration

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