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Performance issue with materialize view refresh Post EBS upgrade

edited Aug 26, 2019 5:09PM in SQL Performance (MOSC) 7 commentsAnswered

Hello

After Oracle EBS upgrade from R12.2.4 to R12.2.8 , there is performance issue observed  with materialize view refresh . the MV refresh used to complete in 35 to 40 minutes pre upgrade however post upgrade ,the refresh is taking around 80 min . At  the database level we haven't made any change  and the version is (12.1.0.2). as per the explain plan insert operation is taking time .the MV refresh method is 'complete'.

also  observed that  the sql id for insert operation   post upgrade is showing different then the pre upgrade  even though we haven't change any  MV  sql query  because of this when we are importing old sql id plan of preupgrade instance , its not picking up     .

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