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Performance Monitoring & Optimization Flashcards

7 cards from real CBDH practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Performance Monitoring & Optimization flashcards as text

  1. Which combination exposes Prometheus-scrapable metrics on a Fabric peer?

    Answer: Set metrics.provider to prometheus and configure operations.listenAddress

    The operations service serves a /metrics endpoint when metrics.provider is prometheus and operations.listenAddress is set.

  2. Which operations-service endpoint reports whether a peer or orderer is healthy?

    Answer: /healthz

    The operations service exposes /healthz for liveness and health checks.

  3. Which tool is the Hyperledger project for benchmarking a blockchain network's TPS and latency?

    Answer: Hyperledger Caliper

    Caliper runs configurable workloads against a system under test and reports throughput and latency.

  4. How can you change a peer's log level at runtime without restarting it?

    Answer: Send a PUT to the operations service /logspec endpoint

    The operations service /logspec endpoint lets you read and set the log specification dynamically.

  5. Which metrics providers can Fabric nodes be configured to use?

    Answer: Prometheus, StatsD, or disabled

    The metrics.provider setting accepts prometheus, statsd, or disabled.

  6. In a Caliper benchmark round, what does a fixed-rate controller do?

    Answer: Sends transactions at a constant configured TPS

    A rate controller governs the send rate, and fixed-rate holds it at a constant TPS.

  7. Which kind of metric would you watch to see whether a peer is falling behind in block commits?

    Answer: Ledger blockchain height compared across peers

    Comparing ledger blockchain height across peers on a channel reveals commit lag.

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Sources & references

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  1. blockchaintrainingalliance.com — Test delivery, passing score, score release, test dates, fees, exam format, time limit · verified Oct 2026