WebLogic portal generating lot of info into the diagnostic framework store file WLS_DIAGNOSTICS000000.DAT

WLS_DIAGNOSTICS000000.DAT

try using:

-Dcom.bea.wlw.netui.disableInstrumentation=true
-D_Offline_FileDataArchive=true


in your startup command, especially of the admin

it seems to be a "best practice"
http://forums.oracle.com/forums/thread.jspa?messageID=3302556&#3302556