4 20G 1 2000000000 10G engine Memory MergeTree ORDER BY tuple() type Int32 Int32 NULL CREATE TABLE `zz_{type}_{engine}` (x {type}) ENGINE {engine} INSERT INTO `zz_{type}_{engine}` SELECT rand() FROM numbers_mt(1000000000) SETTINGS max_insert_threads = 8 OPTIMIZE TABLE `zz_{type}_MergeTree ORDER BY tuple()` FINAL SELECT sum(x) FROM `zz_{type}_{engine}` DROP TABLE IF EXISTS `zz_{type}_{engine}`