Preview features in Cloudera Data Warehouse on premises

This release of the Cloudera Data Warehouse service on premises introduces this technical preview.

Running queries on system tables (Preview)

Queries against Impala system tables, such as sys.impala_query_live, could get delayed due to admission control constraints. These queries, which require only coordinator resources, were previously blocked by queries competing for executor resources. To address this, Impala introduces an "only coordinators" request pool, allowing system table queries to bypass executor queues and run only on the coordinators to prevent delays during admission. This feature is Technical Preview except for workload aware autoscaling virtual warehouses where it is not supported. For more information, see Running queries on system tables

Apache Jira: IMPALA-13201

User quotas in admission control (Preview)

This release introduces user quotas in Impala admission control, a new feature designed to enhance resource management and ensure fair query distribution across users and groups. This feature is currently in Technical Preview and is not supported for virtual warehouses with workload-aware autoscaling.

For more information, seeUser quotas in Admission Control