metrics.py 文件源码

def get_stats_size(self):
        stats_size = LazyStruct()
        from django.db import connection
        cursor = connection.cursor()
        if 'postgres' in connection.settings_dict['ENGINE']:
            stats_size.row_count = stats_size.data = stats_size.index = 0

            for model in Stats:
                cursor.execute("select count(id) as rows, pg_relation_size('{0}') as data_length, pg_total_relation_size('{0}') - pg_relation_size('{0}') as index_length from {0}".format(model._meta.db_table))
                rows, data, index = cursor.fetchone()
                stats_size.row_count += rows
                stats_size.data += data
                stats_size.index += index
        else:
            raise RuntimeError("Unsupported DB: %s" % connection.settings_dict['ENGINE'])
        return stats_size