# Jetty Locking Files on Windows

I went to edit a css file today on a server an OpenBD Jetty install and the file was locked.  After doing some research I found this [http://docs.codehaus.org/display/JETTY/Files+locked+on+Windows](http://docs.codehaus.org/display/JETTY/Files+locked+on+Windows)  
  
I chose to just stop and restart Jetty because I was on a dev box.  The instructions seem to be straight forward.  
  
My question is though.  If I disable the memory mapped files will there a performance degradation?