Dear Oracle-L, Happy New Year! Last September, I had responded to one of the threads regarding SGA sizing and in that I had mentioned about Bug#19461270 and the havoc it created with ORA-4031s when processing DDLs on interval-partitioned tables. From our internal testing after applying the patch, it looks like this bug has been fixed. It also looks like for Oracle Exadata is part of the overlay patch for Bug#20277621. It is covered as part of BP24. The readme for that is here: https://updates.oracle.com/Orion/Services/download?type=readme&aru=18424548 Hope this helps. Cheers, Gaja Gaja Krishna Vaidyanatha, CEO & Founder, DBPerfMan LLC http://www.dbperfman.com http://www.dbcloudman.com Phone - +1 (650) 743-6060 LinkedIn - http://www.linkedin.com/in/gvaidyan Co-author: Oracle Insights:Tales of the Oak Table - http://www.apress.com/9781590593875 Primary Author: Oracle Performance Tuning 101 - http://www.amzn.com/0072131454 Enabling Exadata, Big Data and Cloud Deployment & Management for Oracle