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mysql 表空间及索引的查看方法

　　本文标签：表空间,索引

1.查看索引

（1）单位是GB

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

（2）单位是MB

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

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

3.查看数据库中所有表的信息

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