SELECT IFNULL(B.engine,'Total') "Storage Engine", CONCAT(LPAD(REPLACE(FORMAT(B.DSize/POWER(1024,pw),3),',',''),17,' '),' ',SUBSTR(' KMGTP',pw+1,1),'B') "Data Size", CONCAT(LPAD(REPLACE(FORMAT(B.ISize/POWER(1024,pw),3),',',''),17,' '),' ',SUBSTR(' KMGTP',pw+1,1),'B') "Index Size", CONCAT(LPAD(REPLACE(FORMAT(B.TSize/POWER(1024,pw),3),',',''),17,' '),' ',SUBSTR(' KMGTP',pw+1,1),'B') "Table Size" FROM (SELECT engine,SUM(data_length) DSize,SUM(index_length) ISize,SUM(data_length+index_length) TSize FROM information_schema.tables WHERE table_schema NOT IN ('mysql','information_schema','performance_schema') AND engine IS NOT NULL GROUP BY engine WITH ROLLUP) B,
(SELECT 3 pw) A ORDER BY TSize;
这会报告每个数据库的数据量和索引量:
SELECT DBName,CONCAT(LPAD(FORMAT(SDSize/POWER(1024,pw),3),17,' '),' ',SUBSTR(' KMGTP',pw+1,1),'B') "Data Size",CONCAT(LPAD(FORMAT(SXSize/POWER(1024,pw),3),17,' '),' ',SUBSTR(' KMGTP',pw+1,1),'B') "Index Size",CONCAT(LPAD(FORMAT(STSize/POWER(1024,pw),3),17,' '),' ',SUBSTR(' KMGTP',pw+1,1),'B') "Total Size" FROM (SELECT IFNULL(DB,'All Databases') DBName,SUM(DSize) SDSize,SUM(XSize) SXSize,SUM(TSize) STSize FROM (SELECT table_schema DB,data_length DSize,index_length XSize,data_length+index_length TSize FROM information_schema.tables WHERE table_schema NOT IN ('mysql','information_schema','performance_schema')) AAA GROUP BY DB WITH ROLLUP) AA,
(SELECT 3 pw) BB ORDER BY (SDSize+SXSize);
这会按存储引擎报告每个数据库的数据量和索引量:
SELECT Statistic,DataSize "Data Size",IndexSize "Index Size",TableSize "Table Size" FROM (SELECT IF(ISNULL(table_schema)=1,10,0) schema_score,IF(ISNULL(engine)=1,10,0) engine_score,IF(ISNULL(table_schema)=1,'ZZZZZZZZZZZZZZZZ',table_schema) schemaname,IF(ISNULL(B.table_schema)+ISNULL(B.engine)=2,"Storage for All Databases",IF(ISNULL(B.table_schema)+ISNULL(B.engine)=1,CONCAT("Storage for ",B.table_schema),CONCAT(B.engine," Tables for ",B.table_schema))) Statistic,CONCAT(LPAD(REPLACE(FORMAT(B.DSize/POWER(1024,pw),3),',',''),17,' '),' ',SUBSTR(' KMGTP',pw+1,1),'B') DataSize,CONCAT(LPAD(REPLACE(FORMAT(B.ISize/POWER(1024,pw),3),',',''),17,' '),' ',SUBSTR(' KMGTP',pw+1,1),'B') IndexSize,CONCAT(LPAD(REPLACE(FORMAT(B.TSize/POWER(1024,pw),3),',',''),17,' '),' ',SUBSTR(' KMGTP',pw+1,1),'B') TableSize FROM (SELECT table_schema,engine,SUM(data_length) DSize,SUM(index_length) ISize,SUM(data_length+index_length) TSize FROM information_schema.tables WHERE table_schema NOT IN ('mysql','information_schema','performance_schema') AND engine IS NOT NULL GROUP BY table_schema,engine WITH ROLLUP) B,
(SELECT 3 pw) A) AA ORDER BY schemaname,schema_score,engine_score;
以下是我多年来使用的一些不错的查询:
这会报告每个存储引擎的数据量和索引量:
这会报告每个数据库的数据量和索引量:
这会按存储引擎报告每个数据库的数据量和索引量:
请注意,每个查询的末尾都有一个内联查询
(SELECT 3 pw)
。pw 只是一个指数,用作 1024 的幂。以下是如何使用它:(SELECT 0 pw)
以字节为单位报告(SELECT 1 pw)
以千字节为单位的报告(SELECT 2 pw)
以兆字节为单位的报告(SELECT 3 pw)
以千兆字节为单位的报告(SELECT 4 pw)
以 TB 为单位的报告(SELECT 5 pw)
以 PB 为单位的报告(如果您有这么多数据,请写信给我,或者至少在 DBA.SE 中发布显示。我相信我们都希望看到)试试看 !!!
至于表限制,这里是MyISAM和InnoDB的限制。