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Performance metrics for Pyramid using StatsD

Project description

Performance metrics for Pyramid using StatsD. The project aims at providing ways to instrument a Pyramid application in the least intrusive way.


Install using setuptools, e.g. (within a virtualenv):

$ pip install pyramid_metrics


Once pyramid_metrics is installed, you must use the config.include mechanism to include it into your Pyramid project’s configuration. In your Pyramid project’s

config = Configurator(.....)

Alternately you can use the pyramid.includes configuration value in your .ini file:

pyramid.includes = pyramid_metrics


Pyramid_metrics configuration (values are defaults):

[app:myapp] = localhost
metrics.port = 8125

metrics.prefix = application.stage

metrics.route_performance = true

Route performance

If enabled, the route performance feature will time the request processing. By using the StatsD Timer type metric, pre-aggregation will provide information on latency, rate and total number. The information is sent two times: per route and globally.

The key name is composed of the route name, the HTTP method and the outcome (as HTTP status code or ‘exc’ for exception).

  • Global key request.<HTTP_METHOD>.<STATUS_CODE_OR_EXC>

  • Per route key route.<ROUTE_NAME>.request.<HTTP_METHOD>.<STATUS_CODE_OR_EXC>



StatsD type:

# Increment a counter named cache.hit by 1

# Increment by N
request.metrics.incr(('', count=len(cacheresult)))

# Stat names can be composed from list or tuple
request.metrics.incr(('cache', cache_action))


StatsD type:

# Set the number of SQL connections to 8
request.metrics.gauge('sql.connections', 8)

# Increase the value of the metrics by some amount
request.metrics.gauge('network.egress', 34118, delta=True)


StatsD type:

# Simple timing
time_in_ms = requests.get('').elapsed.microseconds/1000
request.metrics.timing('net.example.responsetime', time_in_ms)

# Using the time marker mechanism

# Measure different outcome
    # Send measure to key 'something_slow.error'
    request.metrics.marker_stop('something_slow', suffix='error')
    # Send measure to key 'something_slow.ok'
    request.metrics.marker_stop('something_slow', suffix='ok')

# Using the context manager
with request.metrics.timer(['longprocess', processname]):
   # Send measure to 'longprocess.foobar' or 'longprocess.foobar.exc'

Currently implemented

  • Collection utility as a request method

  • Ability to send metrics per Pyramid route

  • Simple time marker mechanism

  • Simple counter

  • Context manager for Timing metric type


  • Full StatsD metric types

  • Extensions for automatic metrology (SQLAlchemy, MongoDB, Requests…)

  • Whitelist/blacklist of metrics

  • Time allocation per subsystem (using the time marker mechanism)


  • The general error policy is: always failsafe. Pyramid_metrics should NEVER break your application.

  • The DNS resolution is done during configuration to avoid recurring latencies.

Project details

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