The traces in the MFEL give detailed information about a particular service. However sometimes it is useful to clear the traces to remove the older entries, removing the traces while the service is running can be problematic, here is a good procedure to use:

From the command line:

  service envivio-muse stop
  rm -Rf /opt/envivio/data/muse/downloads/* 
  service envivio-muse start

Note* If you don't stop the envivio-muse service, and clear the traces, sometimes they never come back. So best to always follow the stop-clear-start procedure.