# local

The `local` metrics plugin stores the values on memory.

## Parameters

### `default_labels`

Specifies the default labels for the metrics. (default: `{agent: "Fluentd", hostname: "#{Socket.gethostname}"}`)

### `labels`

Specifies other custom labels for the metrics. (default: `{}`)

## Example

With this configuration:

```
<system>
  <metrics>
    @type local
  </metrics>
</system>
```

The above configuration will save the internal metrics for plugins on memory. As a result, you can retrieve metrics from memory and also you can replace with your custom metrics plugin.

Actually, @type local metrics plugin has equivalent functionality for previous single value based Ruby instance variables. This behavior will be changed by other 3rd party plugins.

If this article is incorrect or outdated, or omits critical information, please [let us know](https://github.com/fluent/fluentd-docs-gitbook/issues?state=open). [Fluentd](http://www.fluentd.org/) is an open-source project under [Cloud Native Computing Foundation (CNCF)](https://cncf.io/). All components are available under the Apache 2 License.


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.fluentd.org/metrics/local.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.