SYSTEM, METHOD, AND COMPUTER-READABLE MEDIUM FOR AUTOMATED SELECTION OF SAMPLING USAGE IN A DATABASE SYSTEM
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United States of America Patent
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Issued Date -
Mar 26, 2009
app pub date -
Sep 21, 2007
filing date -
Sep 21, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A system, method, and computer readable medium that automate the selection of sampling for statistics collection in a database system are provided. Various resource usage and savings evaluations may be made to determine if a column or index is a candidate for sampling during statistics recollections. If the column is successfully evaluated as a quality candidate for sampling using resource usage and savings evaluations, one or more statistics accuracy evaluations may be made to determine if inaccuracies introduced in the statistics by sampling are tolerable. If the column is successfully evaluated as a quality candidate for sampling using the statistics accuracy evaluations, the column may be designated for sampling during statistics recollections on the column. A column or index is thereby identified or eliminated for sampling and designated as such in an automated manner without manual designation or specification by a database management administrator.
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