Method, system and program for optimizing compression of a workload processed by a database management system
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United States of America Patent
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Oct 9, 2007
Grant Date -
Sep 1, 2005
app pub date -
Feb 27, 2004
filing date -
Feb 27, 2004
priority date (Note) -
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Abstract
The present invention provides a method, system and program for optimizing compression of a workload processed by a database management system. In an embodiment of the present invention a method of optimizing the compression of database workloads is provided. Initially, an estimate of a cost of execution for each query according to a defined metric such as execution time or memory consumption is determined. A sub-set of queries is then selected from the workload in order of the most costly to least costly relative to the defined metric for compression according to either a predetermined compression threshold percentage or a threshold percentage derived from an allotted workload execution time. Compression is then performed on the selected sub-set of queries (i.e. those that will benefit the most from the compression) to achieve a net beneficial trade-off between the cost of workload compression and the cost of workload execution.
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