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HAProxy server response errors
critical

Description Too many response errors to {{ $labels.server }} server (> 5%).
Query for 1m 
>>>
	
				
					(sum by (server) (
				
			
				
					
					
						rate
					
				
			
				
					(
				
			
				
					
				
			
				
					[1m])) / sum by (server) (
				
			
				
					
					
						rate
					
				
			
				
					(
				
			
				
					
				
			
				
					[1m]))) * 100 > 5
Query Explanation

The query calculates, per server, the percentage of error responses by dividing the 1‑minute rate of haproxy_server_response_errors_total by the 1‑minute rate of haproxy_server_http_responses_total, multiplying by 100, and triggers when that value exceeds 5 %. If any server’s error‑rate crosses this 5 % threshold, the alert fires.

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