The CFS volume on our CE was full. I plan on adjusting the volume sizes in the near future, until then, I performed a 'clear cache' and a 'cfs clear' to free things up.
Now the CE admin webpage no longer shows stats under the Reporting link--performing a 'sh stat http usage' from the console results in the following error:
'stat/cache/http/usage/cpu/sum not found'
Do I need to restart the CE to start gathering stats again?