show global status like 'Threads_%';
### innodb_buffer_pool
show global status like 'innodb_buffer_pool%';
show variables like 'innodb_page_size';
page大小,默认是16KB
innodb_buffer_pool_instances 缓冲池实例的数量,8 (or 1 if innodb_buffer_pool_size < 1GB)
http://www.server110.com/mysql/201704/73311.html