请教有关mysql的速度

请教有关mysql的速度

想问一下mysql的运行速度,假设2000人对一台有20000条记录的数据库同时进行查询
是否会占用大量的系统资源。而且查询速度是否会很慢。      
The performance tuning of database is complex.Some are releated to your application programs and maybe some are releated to your dbms.For the best performance of mysql,it can query quickly over 1,000,000 rows data.But the parallel query maybe take a lot of your cpu times and memory.