Unrealfrontend crashed & using -memoryprofiler commandline

hi!
the unrealfrotend crashed after i use the -memoryprofiler commandline to collect the memroy management info, is it the right way to check the game memory? And the ue4statsraw file is so large!!! just for a little minutes, the size will be almost 500M!

well if there is a better way to check the memory managment, thanks for telling me!!!
thanks!