Exalytics and OBIEE - Upgraded 12c Dashboard Loads Very Slow When Compared To OBIEE 11g

(Doc ID 2249187.1)

Last updated on MARCH 30, 2017

Applies to:

Business Intelligence Server Enterprise Edition - Version and later
Business Intelligence Server Administrator - Version and later
Oracle Exalytics Software - Version and later
Information in this document applies to any platform.


Performance degradation occurs on OBIEE reports after upgrade from 11g to 12c.  For example, when running a certain dashboard in OBIEE 11g it loads in 15 seconds. After upgrade to 12c, the same dashboard with the exact same set of queries, takes 35 second to display.
In 11g, the nqquery.log shows a max (Logical Query) Total time in BI Server of 5.885 seconds, whereas in the 12c environment, it is 11 seconds. The 11g compilation time is less than 1 second as compared to more than 2 seconds in OBIEE 12c.

This problem is seen on OBIEE through and can occur on any OBIEE server environment (Exalytics and standalone servers).  It is typically occurring on reports that contain many columns and that may be using row-wise initialization blocks.


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