According to its (not very descriptive) man page, the FileStatsAgent "collects file stats."
The process has also been running at ~100% CPU nonstop on my configuration.
I found this thread, which suggests killing FileStatsAgent in Activity monitor and deleting the following files from /System/Library/Components/ :
I did not have these files in my Components folder, so I was unable to test this solution. Maybe it will work for you!
Currently Being ModeratedOct 29, 2013 2:50 AM (in response to macfanatic222)
I don't have these files either, but I noticed that the process was active during a sort of scan of my itunes folder and some audio components were involved in the "open files and ports" tab of the process in the activity monitor.
I had this issue as well. It looks like the process had a handle on an mp3 file and had some issues processing it. I removed the file and haven't seen FileStatsAgent since.
It looks like there's a bug in this process where it has no exit condition if it cannot process a file.
Currently Being ModeratedOct 31, 2013 8:55 AM (in response to Arvind Dorai)