Key Load Balancer Settings Engineers Should Tune Before They Cause Outages

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Default load balancer configurations are often poorly suited to real-world production workloads, according to a guide by Dr. Samson Tanimawo of NovaAIOps. AWS ALB's default 60-second idle timeout can silently drop requests that legitimately take longer, causing 502 errors with no app-side log trace. Health check intervals should be tightened to 10 seconds with stricter recovery thresholds — requiring 3 to 5 consecutive successes before marking an instance healthy again to prevent premature traffic routing. Features like slow-start mode and cross-zone load balancing should be enabled to handle cold instances and uneven traffic distribution across availability zones. Tanimawo advises engineers to treat sticky sessions as a last resort and to audit all LB defaults against their specific application's behavior.

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ProgrammingDEV Community ·

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