Markers are little icons used in graphs on AppSignal.com to indicate a change. This can be a code deploy using a "Deploy marker" or a special event with a "Custom marker".
Custom markers can be used for anything from scaling operations, to sudden spikes in traffic and infrastructure issues such as when a database was acting up.
See also our announcement posts about Custom markers:
Creating a custom marker
A custom marker can be created in two ways. Through the UI on AppSignal.com on the graphs or with a request to our API.
Using the Graph UI
When on AppSignal.com open a page with a graph on it, any graph. Hover over a space in a graph and you will be presented with a "Add marker" button. In the "Add marker" lightbox, select an icon, set a message and create your marker. To edit or delete a marker, click on the icon and you will be brought back to the editor.
Using the AppSignal API
Please read our Markers API endpoint documentation page for more information on how to create a marker using the AppSignal API.