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  • mysql 表空间及索引的查看方法

    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') AS'Total'FROM information_schema.TABLES WHERE table_schema LIKE 'database';
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  • 原文地址:https://www.cnblogs.com/lizhi221/p/6814305.html
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