Python Profiling

Getting started guide

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Supported environment

  • Linux, OS X or Windows. Python version 2.7, 3.4 or higher.
  • Memory allocation profiler and some GC metrics are only available for Python 3.
  • CPU and Time profilers only support Linux and OS X.
  • Time (blocking call) profiler supports threads and gevent.

Installing the agent

Install the Python agent by running

pip install stackimpact

And import the package in your application

import stackimpact

Configuring the agent

Start the agent in the main thread by specifying the agent key and application name. The agent key can be found in your account’s Configuration section.

agent = stackimpact.start(
    agent_key = 'agent key here',
    app_name = 'MyPythonApp')

All initialization options:

  • agent_key (Required) The access key for communication with the StackImpact servers.
  • app_name (Required) A name to identify and group application data. Typically, a single codebase, deployable unit or executable module corresponds to one application.
  • app_version (Optional) Sets application version, which can be used to associate profiling information with the source code release.
  • app_environment (Optional) Used to differentiate applications in different environments.
  • host_name (Optional) By default, host name will be the OS hostname.
  • debug (Optional) Enables debug logging.
  • cpu_profiler_disabled, allocation_profiler_disabled, block_profiler_disabled, error_profiler_disabled (Optional) Disables respective profiler when True.
  • include_agent_frames, include_system_frames (Optional) Set to True to not exclude agent and/or system stack frames from profiles.
  • auto_destroy (Optional) Set to False to disable agent’s exit handlers. If necessary, call destroy() to gracefully shutdown the agent.

Analyzing performance data in the Dashboard

Once your application is restarted, you can start observing continuously recorded CPU, memory, I/O, and other hot spot profiles, execution bottlenecks as well as process metrics in the Dashboard.

Screenshot

Troubleshooting

To enable debug logging, add debug = True to startup options. If the debug log doesn’t give you any hints on how to fix a problem, please report it to our support team in your account’s Support section.