This post will discuss logging via the Operations Dashboard in AEM 6.0 and beyond, and will also include a short tutorial to set it up for quick troubleshooting for developers and system operators alike.
The readme and use of the helper bash script should be sufficient to get you up and running in no time. The installation is very straightforward, just drop the script into the log directory of your AEM instance, chmod to allow execution, and then start viewing your JS Use class logs! An alternative approach is to alias it, then use it as a standalone command.
Request log in AEM plays a very vital role towards analysis of site performance. For each request and response one entry is written into request.log file, you can analyze this log file to find out maximum time taken by a request to load and then troubleshoot the issue to increase overall site performance.