[ https://issues.apache.org/jira/browse/HIVE-21694?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
mahesh kumar behera updated HIVE-21694: --------------------------------------- Status: Patch Available (was: Open) > Hive driver wait time is fixed for task getting executed in parallel. > --------------------------------------------------------------------- > > Key: HIVE-21694 > URL: https://issues.apache.org/jira/browse/HIVE-21694 > Project: Hive > Issue Type: Bug > Components: HiveServer2 > Affects Versions: 4.0.0 > Reporter: mahesh kumar behera > Assignee: mahesh kumar behera > Priority: Major > Labels: pull-request-available > Fix For: 4.0.0 > > Attachments: HIVE-21694.01.patch > > Time Spent: 10m > Remaining Estimate: 0h > > During a command execution hive driver executes the task in a separate thread > if the task to be executed is set as parallel. After starting the task, > driver checks if the task has finished execution or not. If the task > execution is not finished it waits for 2 seconds before waking up again to > check the task status. In case of task with execution time in milliseconds, > this wait time can induce substantial overhead. So instead of fixed wait > time, exponential backedup sleep time can be used to reduce the sleep > overhead. The sleep time can start with 100ms and can increase up to 2 > seconds doubling on each iteration. -- This message was sent by Atlassian JIRA (v7.6.3#76005)