Oracle 19c New Feature High-Frequency Statistics

The automatic optimizer statistics collection job which calls DBMS_STATS package runs in predefined maintenance windows and these maintenance windows are open once a day during which various jobs including the gathering of statistics is performed. For volatile tables statistics can go stale between two consecutive executions of such automatic statistics collection jobs. The presence of […]

Restoring Optimizer Statistics

In some cases we may find that gathering fresh statistics has led to the optimizer executing sub-optimal execution plans and we would like to restore the statistics as of a date when we had good performance. REMEMBER – we gather statistics to ensure that the optimizer chooses the optimal execution plans, but gathering statistics invalidates […]

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dbms_stats

Oracle 19c New Feature High-Frequency Statistics

Restoring Optimizer Statistics

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