Monitor queues

The Queues page is scheduler dependent and displays details of YARN queues. You can either view queues from all the partitions or filter to view queues of a partition.

Capacity Scheduler



View Queue Details

In the capacity scheduler view, click the circle that represents a particular queue. The right column of the page gets updated with details of that queue.

The following example shows the details of a queue:



You can double-click the queue to view its details on a separate page. You can also view details of any application submitted to that queue by clicking its corresponding Application ID.

Fair Scheduler



In the fair scheduler view, click the circle that represents a particular queue. The right column of the page gets updated with details of that queue.

The steady fair memory share is set as 100% for each queue, meaning that it shows 100% when a queue uses all of its steady fair share memory. When a queue uses more memory than its steady fair share, the value is more than 100%. On the UI steady fair memory share is called steady fair memory.

There are two kinds of resource calculator: DefaultResourceCalculator and DominantResourceCalculator. When you use the DefaultResourceCalculator, resources are allocated based on the available memory. The DominantResourceCalculator is based on the Dominant Resource Fairness (DRF) model of resource allocation. In the case of fair scheduler, queue page shows the results of the DefaultResourceCalculator.

The following example shows the details of a queue: