Manual:$wgEnableProfileInfo/pt-br

Details
Controls the availability of, which shows profiling data.

If set to true, profiling data will be stored in the  table inside the database. If you want to log profiling data, enable  in your StartProfiler.php and run   to create the profiling table. You can also set  to a different value in order to store/display profiling data differently. See for more information!