innodb_file_format是MySQL InnoDB存储引擎中的一个系统变量,它定义了InnoDB表文件的格式。这个格式决定了表中数据如何存储和访问。InnoDB支持多种文件格式,包括Antelope和Barracuda,后者又进一步细分为DYNAMIC和COMPRESSED两种类型。 innodb_file_format是只读的 innodb_file_format变量是只读的,这意味着一旦MySQL实例初始化后...
innodb_log_file_size参数在MySQL 5.6/5.7/8.0的默认值为48MB, 当插入记录总长度超过48M时,就会提示Row size too large(无论innodb_file_format) Compact和redumdant的区别在行记录的首部不同,compact存储格式的首部为一个非NULL的变长字段长度列表,而redundant存储格式的首部是一个字段长度偏移列表。 对于Redundant...
In particular, I like Facebook materials as they are third party (no need for an agenda) and they have one of the largest MySQL deployments in the world. As you can see they have had very successful setups combining SSD technology with compression. Will it benefit you?That will depend on...
[8 Nov 2016 20:11] Daniel Price Posted by developer: As of MySQL 5.7.9, the innodb_file_format setting is ignored when creating tables that use the DYNAMIC row format. A table created using the DYNAMIC row format always uses the Barracuda file format, regardless of the innodb_file_format...
7时代的配置在MySQL 8.0不再被支持，同时某些参数不再建议使用，如果继续保留在配置文件中，会导致8....
16384 Max_data_length: 0 Index_length: 0 Data_free: 0 Auto_increment: NULL Create_time: 2017-01-14 01:37:55 Update_time: 2017-01-14 01:50:39 Check_time: NULL Collation: utf8_general_ci Checksum: NULL Create_options: Comment: 行格式对磁盘空间的占用情况 示例: MYSQL5.7.20 create...
第一,mysql的版本需要大于5.5 第二,设置innodb_file_format=barracuda 第三,create table或者alter talble 增加 ROW_FORMAT=COMPRESSED KEY_BLOCK_SIZE=8;(默认的key_block_size=16) 1. 2. 3. 其实很简单,根据经验,一般压缩比例可以达到30%-40%
官方的解释可以参考如下的链接:http://dev.mysql.com/doc/refman/5.5/en/innodb-parameters.html#sysvar_innodb_file_format 测试过程中发现,如果是innodb_file_format=barracuda而innodb_file_format_max=antelop,那么在建立压缩表的时候,max会自动变成barracuda。
Collation | utf8_general_ci Checksum | None Create_options | Comment | > show variables like 'innodb_file_format'; # mysql5.7 默认row_format格式 是 Barracuda +---+---+ | Variable_name | Value | +---+---+ | innodb_file_format |...
InnoDBFileFormat