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---
layout: default
title: Instrumentation
parent: How-to guide
---
# Instrumentation
Since 2.34.0
{: .label }
To enable ActiveSupport notifications, use the `instrumentation_enabled` option:
```ruby
# config/application.rb
# Enable ActiveSupport notifications for all ViewComponents
config.view_component.instrumentation_enabled = true
```
Then subscribe to the `!render.view_component` event:
```ruby
ActiveSupport::Notifications.subscribe("!render.view_component") do |*args|
event = ActiveSupport::Notifications::Event.new(*args)
event.name # => "!render.view_component"
event.payload # => { name: "MyComponent", identifier: "/Users/mona/project/app/components/my_component.rb" }
end
```
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