We shall make MySQL to be able use multiple CPUs for bulk inserts, "LOAD DATA INFILE", Alter table to get better performance on larger boxes. Now we have some partial solution but it works only for MyISAM and only for complete index rebuilds. We might have special option something like ALTER PARALLEL=4 TABLE ... to be able to mannage how many resources the long statement would consume. Note we need special care for auto_increment values if we load data in the parallel. This task was inspired by attempt to create 1.000.000.000 rows table on 16CPU 32G box.