[ https://issues.apache.org/jira/browse/HIVE-17784?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Mithun Radhakrishnan updated HIVE-17784: ---------------------------------------- Attachment: HIVE-17784.1.patch Tentative first cut. > Make Tez AM's Queue headroom calculation and nParallel tasks configurable. > -------------------------------------------------------------------------- > > Key: HIVE-17784 > URL: https://issues.apache.org/jira/browse/HIVE-17784 > Project: Hive > Issue Type: Bug > Components: Query Planning, Tez > Affects Versions: 2.2.0, 3.0.0 > Reporter: Mithun Radhakrishnan > Assignee: Mithun Radhakrishnan > Attachments: HIVE-17784.1.patch > > > Here's a couple of customizations we made at Yahoo with Hive Tez AMs: > # When calculating splits, {{HiveSplitGenerator}} takes the entire queue's > capacity as available, and generates splits accordingly. While this greedy > algorithm might be acceptable for exclusive queues, on a shared queue, greedy > queries will hold other queries up. The algorithm that calculates the queue's > headroom should be pluggable. The greedy version can be the default. > # {{TEZ_AM_VERTEX_MAX_TASK_CONCURRENCY}} and the AM's heap-size can be tuned > separately from the AM's container size. We found that users who attempt to > increase vertex concurrency tend to forget to bump AM memory/container sizes. > It would be handier if those values were derived from the container size. > I'm combining these into a single patch, for easier review. -- This message was sent by Atlassian JIRA (v6.4.14#64029)