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Code-level metrics

Code-level metrics allow developers using the New Relic CodeStream extension to see APM data displayed contextually in their IDE, alongside individual methods in the code. This allows developers to be more proactive about addressing performance issues as they write and review code.

Getting started

First, install the New Relic CodeStream extension into your supported IDE of choice and log in.

Importante

Code-level metrics are available in Ruby agent version 8.8.0 and higher. For versions 8.10.0 and higher, code-level metrics are enabled by default. For versions 8.8.0 and 8.9.0 they must be enabled via configuration. To enable code-level metrics, either set code_level_metrics.enabled: true in newrelic.yml or NEW_RELIC_CODE_LEVEL_METRICS_ENABLED=true as an environment variable.

Agent attributes

The Ruby agent reports and attaches the following attributes to spans produced by your application:

Name

Description

Example

code.function

The name of the instrumented function (Ruby method). Note that class methods will be prefixed by self..

create

code.filepath

The absolute path to the source code file in which code.function is defined

/app/app/controllers/widgets_controller.rb

code.lineno

The line number where code.function is defined in code.filepath

1138

code.namespace

The namespace (class or module name) in which code.function is defined

WidgetsController

Importante

Not every method in your application code will be instrumented with the above attributes. As of version 8.10.0, the Ruby agent will provide code-level metrics for Rails controller methods, ActiveJob methods, and any Ruby method which has been configured to be manually traced.

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