Adopting Elixir

SASL Reports

SASLs, or System Architecture Support Libraries, ship as part of Erlang/OTP, providing detailed progress and crash reports. They extend Erlang and Elixir loggers to provide detailed reports from supervisors. We can enable it either with a command-line flag or a configuration option.

You can start Elixir or IEx with SASL enabled by passing the --logger-sasl-reports true flag. Create a new application to try it out:

$ mix new sasl_sample

Start it in an IEx session with the SASL reports flag enabled, like this:

$ iex --logger-sasl-reports true -S mix

00:10:51.385 [info]  Child Logger.ErrorHandler of
                     Supervisor Logger.Supervisor started
Pid: #PID<0.79.0>
Start Call: Logger.Watcher.start_link({:error_logger, ...