Configuring global admission control
Learn how to configure admission control in Impala Virtual Warehouses, including enabling and disabling the global admission controller.
Enabling global admission control
The global admission controller is designed to handle query admission in Impala Virtual Warehouses that have more than one active coordinator. You can enable this feature for an Impala Virtual Warehouse created in High Availability (HA) Active-Active mode.
By default, coordinators have an admission controller regardless of high availability (HA)
mode. With this feature, you can either run the admission controller as a separate service
outside of all coordinators (when enabled) or use the default mode (when disabled), where
the admission controller runs within the coordinators.
Disabling global admission control
To deactivate the global admission controller for debugging or other purposes, you can
perform the following steps:
- Log in to the Cloudera web interface and navigate to the Cloudera Data Warehouse service. The Overview page displays.
- In the Overview page under Virtual
Warehouses tab, select the Virtual Warehouse where you want to disable
admission controller, click the
icon and select the Edit action form
the list of actions. - In the Sizing And Scaling tab, view the properties you can adjust to disable the service.
- Deselect the Enable Global Admission Controller checkbox.
- Click the Apply changes button at the bottom of the page to apply your changes.
