Pivotal Engineering Journal
Technical articles from Pivotal engineers.
Oct 12, 2016
Profiling Query Compilation Time with GPORCA
GPORCA is Pivotal’s Query Optimizer for Greenplum Database and Apache HAWQ (incubating). In this post, we describe how users can profile query compilation with GPORCA. This will aid users in understanding which of GPORCA’s steps is the most resource intensive, and what transformations are being triggered. Based on this information, users can provide query hints to reduce or increase the search space, see where the time and memory is being spent, and learn how to influence its decision making.
Aug 2, 2016
Improving Constraints In ORCA
ORCA is Pivotal’s Query Optimizer for big data. We look at how we improved ORCA’s understanding of logical constraints.
Jan 28, 2016
GPORCA, A Modular Query Optimizer, Is Now Open-Source
GPORCA has achieved an overall 5X performance improvement across all 99 industry standard benchmark queries. Now we call on the community to help take the project to the next level.