This page describes to view, create, and name tiers and nodes. In the Controller UI, you can use Tiers & Nodes to view and organize tiers, and the monitored nodes within each tier. 

View All Tiers and Nodes

To view the list of tiers and nodes, click Tiers & Nodes in the left application panel. The tier list shows all tiers and health data for each tier.  

In the tiers list, the Machine Agent column indicates whether the Standalone Machine Agent is reporting to the Controller. If the Machine Agent is not reporting, the column is empty. In this case, either an agent is not installed or it is not reporting.

You can change descending and ascending order of the list by clicking on any of the columns.

View Tier and Node Dashboards

In Tiers & Nodes, select a tier or node and click Details. The tier and node dashboards contain a flow map view at the tier or node level, including widgets for health statuses, load time, response time, and errors. The Memory tab shows memory information relevant to your application environment. Note that the specific information shown for each environment can vary, depending on the environment. PHP memory management is different than other languages. The relevant memory metrics supplied by the App Agent for PHP are in the Metric Browser

Create a Tier

You can create a tier in the AppDynamics model of your environment by specifying the new tier in the agent configuration of your instrumented application (recommended method). However, you can also create tiers manually by navigating to Tiers & Nodes > Actions > Create App Server Tier.

After creating a tier, you can add nodes to the tier through the app agent configuration, or by reassigning an existing node to the new tier. 

Rename Node, Tier, or Business Application in the UI

To rename a node, tier, or business application, see interacting with flow maps.

The UI prevents you from using certain special characters for nodes, tiers, and business applications names. Besides numbers, and upper and lower case characters, you can use these special characters in the names :

: ~ ! @ # $ % ^ * ( ) - _ + = / \ \ , . [ ] { } | ? .