code: def sys_mem_limit(self):
          
          if platform.machine() in ['armv7l']:
              _mem_limit = self.human_to_bytes('2700M')  # experimentally determined
          else:
              # Limit for x86 based 32bit systems
              _mem_limit = self.human_to_bytes('4G')
  
          return _mem_limit
docs: Determine the default memory limit for the current service unit.