ORA-47500: XE edition memory parameter invalid or not specified Recently i tried to increase the memory_max_target in Spfile as well through cmd.But After restart the instance it shows "ORA-47500: XE edition memory parameter invalid or not specified".I couldn't start the instance,but later i started by create SPfile from pfile.why this error comes after change the memory?Should i need enterprise edition??
XE is limited to 1 GB, you can not increase its memory.

Oracle Database XE RAM Limitation


  The maximum amount of RAM that an Oracle Database XE database uses
  cannot exceed 1 gigabyte, even if more is available.