压缩表

设置MySQL压缩表的步骤：

1、设置参数，同时修改配置文件。该参数不修改，不起作用。

set global innodb_file_format=Barracuda;

2、创建表时候，增加 row_format=COMPRESSED KEY_BLOCK_SIZE=8

3、查看压缩表：

>show table status like 'user_device_info'\G

*************************** 1. row ***************************

          Name: user_device_info

        Engine: InnoDB

        Version: 10

    Row_format: Compressed       # 注意注意这里

          Rows: 70756484

Avg_row_length: 172

    Data_length: 12238454784

Max_data_length: 0

  Index_length: 6180831232

      Data_free: 3670016

Auto_increment: NULL

    Create_time: 2018-05-17 14:44:59

    Update_time: NULL

    Check_time: NULL

      Collation: utf8_general_ci

      Checksum: NULL

Create_options: row_format=COMPRESSED KEY_BLOCK_SIZE=8

        Comment:

1 row in set (0.00 sec)