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Etcd high fsync durations
warning

Description Etcd WAL fsync duration increasing, 99th percentile is over 0.5s
Query for 2m 
>>>
	
				
					
					
						histogram_quantile
					
				
			
				
					(0.99, 
				
			
				
					
					
						rate
					
				
			
				
					(
				
			
				
					
				
			
				
					[1m])) > 0.5
Query Explanation

The rule computes the 99th‑percentile latency of etcd's WAL fsync operations over the last minute with histogram_quantile(0.99, rate(etcd_disk_wal_fsync_duration_seconds_bucket[1m])). If this 99th‑percentile exceeds 0.5 seconds, the alert triggers, indicating unusually slow fsyncs.

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