---
title: Getting Started with Datadog
description: Datadog, the leading service for cloud-scale monitoring.
breadcrumbs: Docs > Infrastructure > Datadog Resource Catalog
---

# aws_xray_sampling_rule{% #aws_xray_sampling_rule %}

## `account_id`{% #account_id %}

**Type**: `STRING`

## `created_at`{% #created_at %}

**Type**: `TIMESTAMP`**Provider name**: `CreatedAt`**Description**: When the rule was created.

## `modified_at`{% #modified_at %}

**Type**: `TIMESTAMP`**Provider name**: `ModifiedAt`**Description**: When the rule was last modified.

## `sampling_rule`{% #sampling_rule %}

**Type**: `STRUCT`**Provider name**: `SamplingRule`**Description**: The sampling rule.

- `attributes`**Type**: `MAP_STRING_STRING`**Provider name**: `Attributes`**Description**: Matches attributes derived from the request.
- `fixed_rate`**Type**: `DOUBLE`**Provider name**: `FixedRate`**Description**: The percentage of matching requests to instrument, after the reservoir is exhausted.
- `host`**Type**: `STRING`**Provider name**: `Host`**Description**: Matches the hostname from a request URL.
- `http_method`**Type**: `STRING`**Provider name**: `HTTPMethod`**Description**: Matches the HTTP method of a request.
- `priority`**Type**: `INT32`**Provider name**: `Priority`**Description**: The priority of the sampling rule.
- `reservoir_size`**Type**: `INT32`**Provider name**: `ReservoirSize`**Description**: A fixed number of matching requests to instrument per second, prior to applying the fixed rate. The reservoir is not used directly by services, but applies to all services using the rule collectively.
- `resource_arn`**Type**: `STRING`**Provider name**: `ResourceARN`**Description**: Matches the ARN of the Amazon Web Services resource on which the service runs.
- `rule_arn`**Type**: `STRING`**Provider name**: `RuleARN`**Description**: The ARN of the sampling rule. Specify a rule by either name or ARN, but not both.
- `rule_name`**Type**: `STRING`**Provider name**: `RuleName`**Description**: The name of the sampling rule. Specify a rule by either name or ARN, but not both.
- `service_name`**Type**: `STRING`**Provider name**: `ServiceName`**Description**: Matches the `name` that the service uses to identify itself in segments.
- `service_type`**Type**: `STRING`**Provider name**: `ServiceType`**Description**: Matches the `origin` that the service uses to identify its type in segments.
- `url_path`**Type**: `STRING`**Provider name**: `URLPath`**Description**: Matches the path from a request URL.
- `version`**Type**: `INT32`**Provider name**: `Version`**Description**: The version of the sampling rule format (`1`).

## `tags`{% #tags %}

**Type**: `UNORDERED_LIST_STRING`