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11g : DBMS_STATS.AUTO_SAMPLE_SIZE

edited Jul 24, 2013 10:36PM in Database Tuning (MOSC) 2 commentsAnswered ✓
 Hi All,
Is 11g : DBMS_STATS.AUTO_SAMPLE_SIZE will default to 100%  for Oracle 11g ?

Will the time taken for AUTO and 100% are both equal for Oracle 11g ?

Doc ID -  605439.1

Note - Note that on 11g, although using auto size for ESTIMATE_PERCENT tends to default to 100% ,because this is an auto sample, the engine may still decide to use a different sample size for tables and columns.  This means that Column statistics could still be gathered with a small sample size and create a histogram that is missing key values. When ESTIMATE_PERCENT is set to a specific numeric value, that value will be used for both the table and columns.

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