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Prometheus TSDB head truncations failed
critical

Description Prometheus encountered {{ $value }} TSDB head truncation failures
Query 
>>>
	
				
					
					
						increase
					
				
			
				
					(
				
			
				
					
				
			
				
					[1m]) > 0
Query Explanation

The query measures the increase in the prometheus_tsdb_head_truncations_failed_total counter over the past minute, and if that increase is greater than 0, the alert fires. In other words, any TSDB head‑truncation failure occurring within the last minute will trigger the alert.

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