http://apache-carbondata-dev-mailing-list-archive.168.s1.nabble.com/Version-upgrade-for-Presto-Integration-to-0-186-tp25453p25507.html
> 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