mysql

查看配置文件

mysql --verbose --help |grep -A 1 'Default options'

查看所有库的数据和索引大小

select table_schema, concat(truncate(sum(data_length)/1024/1024/1024,2),' GB') as data_size,concat(truncate(sum(index_length)/1024/1024/1024,2),'GB') as index_sizefrom information_schema.tablesgroup by table_schemaorder by data_length desc;