# CloudWatch metrics for Amazon VPC Lattice
Amazon VPC Lattice sends data related to your target groups and services to Amazon CloudWatch, and processes it into readable, near real-time metrics. These metrics are kept for 15 months, so that you can access historical information and gain a better perspective on how your web application or service is performing. You can also set alarms that watch for certain thresholds and send notifications or take actions when those thresholds are met. For more information, see the [Amazon CloudWatch User Guide](https://docs.aws.amazon.com//AmazonCloudWatch/latest/monitoring/WhatIsCloudWatch.html).
Amazon VPC Lattice uses a service-linked role in your AWS account to send metrics to Amazon CloudWatch. For more information, see [Using service-linked roles for Amazon VPC Lattice](using-service-linked-roles.md).
**Topics**
+ [View Amazon CloudWatch metrics](#monitoring-cloudwatch-view)
+ [Target group metrics](#monitoring-cloudwatch-tg)
+ [Service metrics](#monitoring-cloudwatch-service)
## View Amazon CloudWatch metrics
You can view the Amazon CloudWatch metrics for your target groups and services using the CloudWatch console or AWS CLI.
**To view metrics using the CloudWatch console**
1. Open the Amazon CloudWatch console at [https://console.aws.amazon.com/cloudwatch/](https://console.aws.amazon.com/cloudwatch/).
1. In the navigation pane, choose **Metrics**.
1. Select the `AWS/VpcLattice` namespace.
1. (Optional) To view a metric across all dimensions, enter its name in the search field.
1. (Optional) To filter by dimension, select one of the following:
+ To display only the metrics reported for your target groups, choose **Target groups**. To view the metrics for a single target group, enter its name in the search field.
+ To display only the metrics reported for your services, choose **Services**. To view the metrics for a single service, enter its name in the search field.
**To view metrics using the AWS CLI**
Use the following [CloudWatch list-metrics](https://docs.aws.amazon.com/cli/latest/reference/cloudwatch/list-metrics.html) AWS CLI command to list the available metrics:
`aws cloudwatch list-metrics --namespace AWS/VpcLattice`
For information about each of the metrics and their dimensions, see [Target group metrics](#monitoring-cloudwatch-tg) and [Service metrics](#monitoring-cloudwatch-service).
## Target group metrics
VPC Lattice automatically stores metrics related to target groups in the `AWS/VpcLattice` [Amazon CloudWatch namespace](https://docs.aws.amazon.com//AmazonCloudWatch/latest/monitoring/cloudwatch_concepts.html#Namespace). For more information about target groups, see [Target groups in VPC Lattice](target-groups.md).
**Dimensions**
To filter the metrics for target groups, use the following dimensions:
+ `AvailabilityZone`
+ `TargetGroup`
| Metric | Description | TargetGroup Protocol |
| --- | --- | --- |
| TotalConnectionCount | Total connections. [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) | HTTP, HTTPS, TCP |
| ActiveConnectionCount | Active connections. [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) | HTTP, HTTPS, TCP |
| ConnectionErrorCount | Total connection failures. [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) | HTTP, HTTPS, TCP |
| HTTP1\$1ConnectionCount | Total HTTP/1.1 connections. [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) | HTTP, HTTPS |
| HTTP2\$1ConnectionCount | Total HTTP/2 connections. [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) | HTTP, HTTPS |
| ConnectionTimeoutCount | Total connection connect timeouts. [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) | HTTP, HTTPS, TCP |
| TotalReceivedConnectionBytes | Total received connection bytes. [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) | HTTP, HTTPS, TCP |
| TotalSentConnectionBytes | Total sent connection bytes. [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) | HTTP, HTTPS, TCP |
| TotalRequestCount | Total requests. [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) | HTTP, HTTPS |
| ActiveRequestCount | Total active requests. [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) | HTTP, HTTPS |
| RequestTime | Request time to the last byte in milliseconds. [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) | HTTP, HTTPS |
| HTTPCode\$12XX\$1Count, HTTPCode\$13XX\$1Count, HTTPCode\$14XX\$1Count, HTTPCode\$15XX\$1Count | Aggregate HTTP response codes. [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) | HTTP, HTTPS |
| TLSConnectionErrorCount | Total TLS connection errors not including failed certificate verifications. [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) | HTTP, HTTPS, TCP |
| TotalTLSConnectionHandshakeCount | Total successful TLS connection handshakes. [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) | HTTP, HTTPS, TCP |
## Service metrics
VPC Lattice automatically stores metrics related to services in the `AWS/VpcLattice` [Amazon CloudWatch namespace](https://docs.aws.amazon.com//AmazonCloudWatch/latest/monitoring/cloudwatch_concepts.html#Namespace). For more information about services, see [Services in VPC Lattice](services.md).
**Dimensions**
To filter the metrics for target groups, use the following dimensions:
+ `AvailabilityZone`
+ `Service`
| Metric | Description |
| --- | --- |
| RequestTimeoutCount | Total requests that timed out waiting for a response. [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) |
| TotalRequestCount | Total requests. [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) |
| RequestTime | Request time in milliseconds. [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) |
| HTTPCode\$12XX\$1Count, HTTPCode\$13XX\$1Count, HTTPCode\$14XX\$1Count, HTTPCode\$15XX\$1Count | Aggregate HTTP response codes. [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/vpc-lattice/latest/ug/monitoring-cloudwatch.html) |