def METHOD_NAME(self):
    size = self.portal()._p_jar.db().getSize()
    # From Zope2.App.ApplicationManager
    if type(size) is str:
        return size
    if size >= 1048576.0:
        return "%.1f MB" % (size / 1048576.0)
    return "%.1f kB" % (size / 1024.0)