Recently we migrated from OBIEE (12.2.1.4.0) to OAS (12.2.1.4).
after migration we observed that few of the BIP schedules are taking more time in OAS version compare to OBIEE version.
after digging into detail we came to know that all long running jobs has BIP report which built on analytics based data model.
we have chosen datamodel created based on analytics report to apply in built security.
Also these datamodels are configured with bursting query.
for example:
some xyz analytics report takes 3 min to out the 1000 records when we create data model using same analytics report it is taking more than 3 min approx 10 min to display 50 records sample data.
when we use SQL query or logical query of same analytics report to create datamodel then it is taking same 3min to give results.
We see the issue for all the analytics based BIP reports across newly migrated OAS tenant. We are also able to reproduce this issue in any of OAS tenants.