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Oracle EXCHANGE PARTITION slow

in SQL Performance (MOSC) 1 commentAnswered

Oracle 11.2.0.4. EE. AIX 7.1


We implement a procedure to exchange partition for a big table. move historical information. the procedure have three Main table , stage table and historical table. We exchange partition ffom main table to stage table , then exchange the stage table with historical table, but the issues is the process spend almots 20" and is increasing, the partition is bewteen 1MM to 5 MM of rows ( becasuse is inteval by month , every month is increased). 

What could be the reason and how can improve ?

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