mysql 表空间大小及索引的查看



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 "zabbix3";
+------------------+
| 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 "zabbix3;

   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 "zabbix3";
+-----------------+
| 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") AS"Total"FROM information_schema.TABLES WHERE table_schema LIKE "zabbix3";