# InnoDB引擎页大小，默认16k
show global status like 'Innodb_page_size';

# Buffer Pool 默认大小是 128M
show variables like '%innodb_buffer_pool%';

# 查询MySQL用户
select *
from mysql.user;

# 查询表的创建语句
show create table sku.person;

# 查询某个表占用的空间
select concat(round(sum(data_length / 1024 / 1024), 2), 'MB') as size
from information_schema.tables
where table_schema = 'fortern_qqnt'
  and table_name = 'group_msg_table';