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caf_profiler

Performance profiling of CAF

CAF (Cloud Assistant Framework)

Co-design permanent, active, stateful, reliable cloud proxies with your web app.

See http://www.cafjs.com

Library to profile the performance of your app.

It measures latency, throughput, and queue length for CA requests.

For an app called root-helloworld access performance data with:

curl https://root-helloworld.cafjs.com/stats

and an example reply is:

{"node_10_5_123_118:1000":
     {"requests":{"type":"counter","count":32},
      "pending":{"type":"counter","count":0},
      "stats":{"type":"timer",
           "duration":{"type":"histogram","min":10.468857362866402,
                       "max":25.201154872775078,"sum":520.6768773496151,
                       "variance":10.983277433789388,
                       "mean":16.271152417175472,
                       "std_dev":3.3141028097796523,
                       "count":32,"median":15.921283978968859,
                       "p75":18.803593004122376,"p95":21.699812030419697,
                       "p99":25.201154872775078,"p999":25.201154872775078},
           "rate":{"type":"meter","count":32,"m1":2.9644e-320,
                   "m5":4.612237719003562e-216,
                   "m15":1.2479503887084598e-73,
                   "mean":0.00021508800984629893,"unit":"seconds"}
      }
     }
}

where:

  • requests Number of of messages received.
  • pending Number of requests queued.
  • duration Latency time (in microseconds) to process your requests. See the metrics package for details.
  • rate Number of requests processed per second. Averages over a moving window (1min, 5min, 15 min) using exponential decay. See the metrics package for details.

See {@link module:caf_profiler/plug_profiler}

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