Found the answer while troubleshooting another issue on our SAN with an EMC support rep.  Commands start with porthconfig.
     Not sure at what FOS level this came in but in my fabrics the switches are logging lots of errors stating the transmit performance is above the high boundary of 10%.  I really want to set this higher but have not found anywhere that this is documented.  This is on a Brocade DCX switch running 7.3.1a firmware. 
How to change traffic utilization error threshold.