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https://issues.apache.org/jira/browse/IMPALA-14562?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18043100#comment-18043100
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ASF subversion and git services commented on IMPALA-14562:
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Commit bff814f0790eedc2ab8040c8ff2b9ad0218c9c69 in impala's branch
refs/heads/master from Sai Hemanth Gantasala
[ https://gitbox.apache.org/repos/asf?p=impala.git;h=bff814f07 ]
IMPALA-14562: Enable Hierarchical event processing by default
IMPALA-12709 Added support for hierarchical metastore event processing.
This commit enables hierarchical event processing by default.
hms_event_polling_interval_s can now be set to decimal value (eg: 0.5)
to support millisecond precision interval. Along with that others
configs can be fine tuned, such as:
num_db_event_executors: To set the number of database level event
executors.
num_table_event_executors_per_db_event_executor: To set the number of
table level event executors within a database event executor.
min_event_processor_idle_ms: To set the minimum time to retain idle db
processors and table processors.
max_outstanding_events_on_executors: To set the limit of maximum
outstanding events to process on event executors.
Testing:
- All the testing required to enable this flag is done in IMPALA-12709
and IMPALA-13801.
Change-Id: Ie9a28f863ef17456817e0a335215450e514b1f5b
Reviewed-on: http://gerrit.cloudera.org:8080/23687
Reviewed-by: <[email protected]>
Reviewed-by: Quanlong Huang <[email protected]>
Tested-by: Impala Public Jenkins <[email protected]>
> Enable Hierarchical event processing by default
> -----------------------------------------------
>
> Key: IMPALA-14562
> URL: https://issues.apache.org/jira/browse/IMPALA-14562
> Project: IMPALA
> Issue Type: Improvement
> Reporter: Sai Hemanth Gantasala
> Assignee: Sai Hemanth Gantasala
> Priority: Major
> Fix For: Impala 5.0.0
>
>
> Hierarchical event processor introduced in IMPALA-12709 enables
> event-processer to catch up lagged events faster, however the config to
> enable hierarchical event processor is disabled by default. This Jira's ask
> is to enable it by default.
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