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# jupyter_server.prometheus package

## Submodules

Log functions for prometheus

jupyter_server.prometheus.log_functions.prometheus_log_method(handler)

  Tornado log handler for recording RED metrics.

  We record the following metrics:

    Rate - the number of requests, per second, your services are serving. Errors - the number of failed requests per second. Duration - The amount of time each request takes expressed as a time interval.

  We use a fully qualified name of the handler as a label, rather than every url path to reduce cardinality.

  This function should be either the value of or called from a function that is the ‘log_function’ tornado setting. This makes it get called at the end of every request, allowing us to record the metrics we need.

Prometheus metrics exported by Jupyter Server

Read https://prometheus.io/docs/practices/naming/ for naming conventions for metrics & labels.

## Module contents