Why would flume create one file per milliseconds?

[higkoohk]

Hello ,all !

   I'm a new flumer , today I use flume to collector web server logs.

   My flume config is 'flume.conf' in attachment,and it's logs named
'flume.log' in attachment.

   I found that flume would create one file per milliseconds ?

Thanks for help !

flume.conf
Description: Binary data

flume.log
Description: Binary data