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dba_autotask_client tips

Oracle Database Tips by Donald BurlesonSeptember 13, 2013


Question:  How can I have system run and collect dbms_stats statistics on a daily basis?


Answer:  Starting in Oracle 10g, Oracle has automatic statistics collection.  You also have the "alter table tablename monitoring".

The dbms_stats.gather_system_stats procedure is especially useful for multi-mode Oracle shops that run OLTP during the day and DSS at night. You invoke the dbms_stats.gather_system_stats procedure as an elapsed time capture, making sure to collect the statistics during a representative heavy workload:

execute dbms_stats.gather_system_stats('Start');
-- xxx delay during high workload
execute dbms_stats.gather_system_stats('Stop');


 To see the execution schedule you can run these queries:

   job_name = 'GATHER_STATS_JOB';



'select * from
   client_name = "auto optimizer stats collection";

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