Hi All, Presto 0.186 version has as lot of improvements that will increase the performance and improve the reliability. Some of the major issues and improvements are listed below.
- Fix excessive GC overhead caused by map to map cast. - Fix issue that may cause queries containing expensive functions, such as regular expressions, to continue using CPU resources even after they are killed. - Fix performance issue caused by redundant casts - Fix leak in running query counter for failed queries. The counter would increment but never decrement for queries that failed before starting. - Reduce memory usage when building data of VARCHAR or VARBINARY types. - Estimate memory usage for GROUP BY more precisely to avoid out of memory errors. - Add Spill to Disk <https://prestodb.io/docs/current/admin/spill.html> for joins. Currently the Presto version that we are using in Carbondata is 0.166 , I would like to suggest to upgrade it to 0.186. Please let me know what the group thinks about it. Regards Bhavya
