R12 - Issue with no manager

Hello, I have issue time to time I have 14 000 000 runs of sql: Select R.Rowid From Fnd_Concurrent_Requests R Where R.Hold_Flag = 'N' And R.Status_Code = 'I' And R.Requested_Start_Date <= Sysdate And (R.Node_Name1 is null or (R.Node_Name1 is not null and FND_DCP.target_node_mgr_chk(R.request_id) = 1)) AND EXISTS ( Select Null From Fnd_Concurrent_Programs P Where P.Enabled_Flag = 'Y' And R.Program_Application_Id = P.Application_Id And R.Concurrent_Program_Id = P.Concurrent_Program_Id AND EXISTS ( Select Null From Fnd_Oracle_Userid O Where R.Oracle_Id = O.Oracle_Id AND EXISTS ( Select Null From Fnd_Conflicts_Domain C Where P.Run_Alone_Flag = C.RunAlone_Flag And R.CD_Id = C.CD_Id ) ) And (P.Execution_Method_Code != 'S' OR