11.79. Release 0.139
Dynamic Split Concurrency
The number of running leaf splits per query is now dynamically adjusted to improveoverall cluster throughput. task.initial-splits-per-node
can be used to setthe initial number of splits, and task.split-concurrency-adjustment-interval
can be used to change how frequently adjustments happen. The session propertiesinitial_splits_per_node
and split_concurrency_adjustment_interval
canalso be used.
General Changes
- Fix planning bug that causes some joins to not be redistributed whendistributed-joins-enabled is true.
- Fix rare leak of stage objects and tasks for queries using LIMIT.
- Add experimental task.join-concurrency config which can be used to increaseconcurrency for the probe side of joins.
Hive Changes
- Remove cursor-based readers for ORC and DWRF file formats, as they have beenreplaced by page-based readers.
- Fix creating tables on S3 with CREATE TABLE AS.
原文: https://prestodb.io/docs/current/release/release-0.139.html