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Remove unused Data Explorer clusters#

Cost Optimization · Data Explorer · Rule · 2022_03 · Important

Regularly remove unused resources to reduce costs.


Billing starts for an Azure Data Explorer (ADX) cluster after it is provisioned. To store data in an ADX cluster, you must first create a database. Clusters without any databases are considered unused and can be removed to reduce costs and management overhead.

Additionally, ADX clusters on a paid tier can stopped. Stopping an ADX cluster de-allocates and removes compute resources. While in the stopped state, compute charges are not incurred. Any data stored in the cluster is persisted while the cluster is stopped.


Consider removing Data Explorer clusters that have no databases and are not used.


This rule applies when analyzing ADX clusters deployed (in-flight) and running within Azure. If the cluster is stopped, this rule is ignored.