flume file channel capacity

[XuGary]

Hi flume developers,    I have one question, for file channel capacity, suppose 
we use default 1000000, since it is the maximum capacity number of events of 
the channel, when No. 1000000+1 event comes, the channel log will be in 
recycle?  My concern is that we do not want the channel log becomes unlimited 
large.  Thanks.Regards,Gary Xu