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Cassandra flush writer blocked tasks
warning

Description Some Cassandra flush writer tasks are blocked - {{ $labels.cassandra_cluster }}
Query for 2m 
>>>
	
				
					
				
			
				
					{pool="MemtableFlushWriter"} > 15
Query Explanation

The rule checks the metric cassandra_thread_pool_blocked_tasks for the MemtableFlushWriter pool and fires when the number of blocked tasks exceeds 15 for a given Cassandra cluster (identified by the cassandra_cluster label). In other words, if more than fifteen flush writer tasks are stuck, the alert is triggered for that cluster.

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