SWAPPING EXPECTED AND CANDIDATE AFFINITIES IN A QUERY PLAN CACHE
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United States of America Patent
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app pub date -
Mar 11, 2013
filing date -
Oct 8, 2012
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Abandoned
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Abstract
In an embodiment, a hit percentage of an expected affinity for a first query is calculated, wherein the expected affinity comprises a first address range in a query plan cache, a hit percentage of a candidate affinity for the first query is calculated, wherein the candidate affinity comprises a second address range in a query plan cache, and if the hit percentage of the candidate affinity is greater than the hit percentage of the expected affinity by more than a threshold amount, query plans in the candidate affinity are swapped with query plans in the expected affinity.
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