mysql 表空間及索引的檢查辦法

mysql 表空間及索引的檢查辦法。本站提示廣大學習愛好者：（mysql 表空間及索引的檢查辦法）文章只能為提供參考，不一定能成為您想要的結果。以下是mysql 表空間及索引的檢查辦法正文

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1.檢查索引

（1）單元是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）單元是MB

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

個中“database”為你所要檢查的數據庫



2.檢查表空間

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.檢查數據庫中一切表的信息

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 'database';