Gluster users - Apr 2015 - Questions on turning on Gluster volume profile

We came across the gluster volume profile link from the gluster.org website
(http://www.gluster.org/community/documentation/index.php/Gluster_3.2:_Start_Profiling).

We are currently running a distributed, replicated gluster volume (16 bricks in
total, replication between 2 bricks) and we would like to turn on the gluster
volume profile to collect some I/O statistics about the volume. We have a few
questions about the profile as follows:

-        Will the system be adversely impacted if we turn on the volume profile
(i.e. could the profile itself cause the volume to hang and/or increase the
read/write latency or any other negative effects)?

-        Do the volume profile add any additional logs to the brick and volume
gluster logs (apart from the screen output of the statistics)? And if yes, can
you quantify how much additional logging in terms of MB per day will be added?

-        Would you recommend that we leave the profile turned on and running for
lengthy periods of time (like for several days at a stretch), or is it meant to
be turned on for only short periods of time?
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