express.http.response_time.95percentile
95th percentile response timeDimensions:None
Available on:
Datadog (1)
Interface Metrics (1)
Dimensions:None
Technical Annotations (15)
CLI Commands (1)
node --trace-sync-io server.jsdiagnosticTechnical References (14)
morgancomponentexpress-status-monitorcomponentSequelizecomponentMongoosecomponentv8-profilercomponentClinic.jscomponentRediscomponentMemcachedcomponentsaturation pointconceptthroughputconceptpercentileconcepttail latencyconceptevent loopconceptTTFBconceptRelated Insights (10)
Slow API response times indicate processing bottleneckswarning
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Slow database queries degrade response timeswarning
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High response times from application bottleneckswarning
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Application saturation causing response time spikes or failurescritical
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Slow tail latency from outlier requests obscured by averageswarning
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Event loop blocking causes request latency spikes under concurrent loadcritical
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High p99 latency from event loop blocking patternswarning
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Synchronous functions block event loop under high trafficwarning
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Average latency masks event-loop stall tail latencywarning
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Event loop congestion causes severe response time degradation at scalecritical
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