---
name: "observer"
section: "3erl"
platform: "linux"
package: "erlang-manpages"
version: "1:25.2.3+dfsg-1+deb12u4"
release: "Debian 12 (Bookworm)"
platforms: ["linux"]
url: "https://new.carta.tech/observer/3erl"
---

# observer(3erl)

A GUI tool for observing an Erlang system.

## NAME

observer - A GUI tool for observing an Erlang system.

## DESCRIPTION

Observer is a graphical tool for observing the characteristics of Erlang systems. The tool Observer displays system information, application supervisor trees, process information, ETS tables, Mnesia tables, and contains a front end for Erlang tracing with module *ttb*.

For details about how to get started, see the *User's Guide*.

## EXPORTS

**start() -\> ok**\

Starts the Observer GUI. To stop the tool, close the window.