mysql 表空间及索引的查看方法

很文博客hinven.com 2021年11月24日08:29:39数据库评论2031044字阅读模式

mysql 表空间及索引的查看方法,需要的朋友可以参考下。

1.查看索引

(1)单位是GB

  1. SELECT CONCAT(ROUND(SUM(index_length)/(1024*1024*1024), 2), ' GB') AS 'Total Index Size' FROM information_schema.TABLES WHERE table_schema LIKE 'database';
  2. +------------------+
  3. | Total Index Size |
  4. +------------------+
  5. | 1.70 GB |
  6. +------------------+

(2)单位是MB

  1. SELECT CONCAT(ROUND(SUM(index_length)/(1024*1024), 2), ' MB') AS 'Total Index Size' FROM information_schema.TABLES WHERE table_schema LIKE 'database';

其中“database”为你所要查看的数据库

2.查看表空间

  1. SELECT CONCAT(ROUND(SUM(data_length)/(1024*1024*1024), 2), ' GB') AS 'Total Data Size'
  2. FROM information_schema.TABLES WHERE table_schema LIKE 'database';
  3. +-----------------+
  4. | Total Data Size |
  5. +-----------------+
  6. | 3.01 GB |
  7. +-----------------+

3.查看数据库中所有表的信息

  1. SELECT CONCAT(table_schema,'.',table_name) AS 'Table Name',
  2. CONCAT(ROUND(table_rows/1000000,2),'M') AS 'Number of Rows',
  3. CONCAT(ROUND(data_length/(1024*1024*1024),2),'G') AS 'Data Size',
  4. CONCAT(ROUND(index_length/(1024*1024*1024),2),'G') AS 'Index Size' ,
  5. CONCAT(ROUND((data_length+index_length)/(1024*1024*1024),2),'G') AS'Total'FROM information_schema.TABLES WHERE table_schema LIKE 'database';

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