ORACLE表空间查看

1. 查看所有表空间大小

 

SQL> select tablespace_name,sum(bytes)/1024/1024 from dba_data_files group by tablespace_name;

 

2. 已经使用的表空间大小

SQL> select tablespace_name,sum(bytes)/1024/1024 from dba_free_space group by tablespace_name;

 

3. 所以使用空间可以这样计算

 

select a.tablespace_name,total,free,total-free used from

( select tablespace_name,sum(bytes)/1024/1024 total from dba_data_files

   group by tablespace_name) a,

( select tablespace_name,sum(bytes)/1024/1024 free from dba_free_space

   group by tablespace_name) b

where a.tablespace_name=b.tablespace_name;

 

 

4. 下面这条语句查看所有segment的大小。

Select Segment_Name,Sum(bytes)/1024/1024 From User_Extents Group By Segment_Name

 

5. 还有在命令行情况下如何将结果放到一个文件里。

SQL> spool out.txt

SQL> select * from v$database;

SQL> spool off

 

 

 

 

SELECT UPPER(F.TABLESPACE_NAME) "表空间名",
　　D.TOT_GROOTTE_MB "表空间大小(M)",
　　D.TOT_GROOTTE_MB - F.TOTAL_BYTES "已使用空间(M)",
　　TO_CHAR(ROUND((D.TOT_GROOTTE_MB - F.TOTAL_BYTES) / D.TOT_GROOTTE_MB * 100,
　　2),
　　'990.99') "使用比",
　　F.TOTAL_BYTES "空闲空间(M)",
　　F.MAX_BYTES "最大块(M)"
　　FROM (SELECT TABLESPACE_NAME,
　　ROUND(SUM(BYTES) / (1024 * 1024), 2) TOTAL_BYTES,
　　ROUND(MAX(BYTES) / (1024 * 1024), 2) MAX_BYTES
　　FROM SYS.DBA_FREE_SPACE
　　GROUP BY TABLESPACE_NAME) F,
　　(SELECT DD.TABLESPACE_NAME,
　　ROUND(SUM(DD.BYTES) / (1024 * 1024), 2) TOT_GROOTTE_MB
　　FROM SYS.DBA_DATA_FILES DD
　　GROUP BY DD.TABLESPACE_NAME) D
　　WHERE D.TABLESPACE_NAME = F.TABLESPACE_NAME
　　ORDER BY 4 DESC

 

 

 

 

 

--查询表空间使用情况
　　SELECT UPPER(F.TABLESPACE_NAME) "表空间名",
　　D.TOT_GROOTTE_MB "表空间小(M)",
　　D.TOT_GROOTTE_MB - F.TOTAL_BYTES "已使用空间(M)",
　　TO_CHAR(ROUND((D.TOT_GROOTTE_MB - F.TOTAL_BYTES) / D.TOT_GROOTTE_MB * 100,2),'990.99') || '%' "使用比",
　　F.TOTAL_BYTES "空闲空间(M)",
　　F.MAX_BYTES "最块(M)"
　　FROM (SELECT TABLESPACE_NAME,
　　ROUND(SUM(BYTES) / (1024 * 1024), 2) TOTAL_BYTES,
　　ROUND(MAX(BYTES) / (1024 * 1024), 2) MAX_BYTES
　　FROM SYS.DBA_FREE_SPACE
　　GROUP BY TABLESPACE_NAME) F,
　　(SELECT DD.TABLESPACE_NAME,
　　 ROUND(SUM(DD.BYTES) / (1024 * 1024), 2) TOT_GROOTTE_MB
　　FROM SYS.DBA_DATA_FILES DD
　　GROUP BY DD.TABLESPACE_NAME) D
　　WHERE D.TABLESPACE_NAME = F.TABLESPACE_NAME
　　ORDER BY 1
　　--查询表空间的free space
　　select tablespace_name,
　　count(*) as extends,
　　round(sum(bytes) / 1024 / 1024, 2) as MB,
　　sum(blocks) as blocks
　　from dba_free_space
　　group by tablespace_name;
　　--查询表空间的总容量
　　select tablespace_name, sum(bytes) / 1024 / 1024 as MB
　　from dba_data_files
　　group by tablespace_name;
　　--查询表空间使用率
　　select total.tablespace_name,
　　round(total.MB, 2) as Total_MB,
　　round(total.MB - free.MB, 2) as Used_MB,
　　round((1 - free.MB / total.MB) * 100, 2) || '%' as Used_Pct
　　from (select tablespace_name, sum(bytes) / 1024 / 1024 as MB
　　from dba_free_space
　　group by tablespace_name) free,
　　(select tablespace_name, sum(bytes) / 1024 / 1024 as MB
　　from dba_data_files
　　group by tablespace_name) total
　　where free.tablespace_name = total.tablespace_name;

 

 

 

 

 

 

SELECT UPPER(F.TABLESPACE_NAME) "表空间名",
       　　D.TOT_GROOTTE_MB "表空间大小(M)",
       　　D.TOT_GROOTTE_MB - F.TOTAL_BYTES "已使用空间(M)",
       　　TO_CHAR(ROUND((D.TOT_GROOTTE_MB - F.TOTAL_BYTES) /
                         D.TOT_GROOTTE_MB * 100,
                         　　2),
                   　　 '990.99') "使用比",
       　　F.TOTAL_BYTES "空闲空间(M)",
       　　F.MAX_BYTES "最大块(M)" 　　FROM (SELECT TABLESPACE_NAME,
                                                    　　ROUND(SUM(BYTES) /
                                                              (1024 * 1024),
                                                              2) TOTAL_BYTES,
                                                    　　ROUND(MAX(BYTES) /
                                                              (1024 * 1024),
                                                              2) MAX_BYTES 　　FROM SYS.DBA_FREE_SPACE 　　GROUP BY TABLESPACE_NAME) F,
       　　 (SELECT DD.TABLESPACE_NAME,
                    　　ROUND(SUM(DD.BYTES) / (1024 * 1024), 2) TOT_GROOTTE_MB 　　FROM SYS.DBA_DATA_FILES DD 　　GROUP BY DD.TABLESPACE_NAME) D 　　WHERE D.TABLESPACE_NAME = F.TABLESPACE_NAME 　　ORDER BY 4 DESC