You can monitor Impala executors and get related metrics.
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In the Welcome screen, click grid , and
then select Manage.
A list of dashboard groups appears:
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Click the impala dashboard group.
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In the list of Impala dashboards, and select Impala - Executor.
The number of Executor Groups and Executors appear.
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View graphs and metrics of memory usage.
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Get information about Executor node CPU usage.