SYSTEM表空間過大問題

巡檢發現system表空間使用率太高

select a.tablespace_name,total,free,total-free used, (total-free)/total 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 order by (total-free)/total ;

TABLESPACE_NAME TOTAL FREE USED FREE/TOTAL
------------------------------ ---------- ---------- ---------- ----------
A11_ 28000 9823.0625 18176.9375 .350823661
A11_ 142512 29388.8125 113123.188 .206219915
SYSAUX 5120 3242.8125 1877.1875 .633361816
SYSTEM 5120 767.25 4352.75 .149853516
UNDOTBS1 1595 1021.5 573.5 .640438871
UNDOTBS2 1300 560.25 739.75 .430961538
USERS 5 3.5625 1.4375 .7125

7 rows selected.

 

檢查system表空間中佔用空間最大對象

  SELECT * FROM (SELECT SEGMENT_NAME, SUM(BYTES) / 1024 / 1024 MB FROM DBA_SEGMENTS WHERE TABLESPACE_NAME = 'SYSTEM' GROUP BY SEGMENT_NAME ORDER BY 2 DESC) WHERE ROWNUM < 10;

aud$爲審計功能

導出aud$的數據備查後，

 truncate table aud$;

 

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如下是第二個系統的狀況：

select a.tablespace_name,total,free,total-free used, (total-free)/total 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 order by (total-free)/total ;

 

查看最大對象：

 

導出數據，並截斷 aud$後

 

system問題以解決，仍需繼續觀察users表空間，是否在繼續增加。該系統未將用戶數據存放爲單獨表空間。

 

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一下是第三套系統狀況：

 

SELECT * FROM (SELECT SEGMENT_NAME, SUM(BYTES) / 1024 / 1024 MB FROM DBA_SEGMENTS WHERE TABLESPACE_NAME = 'SYSAUX' GROUP BY SEGMENT_NAME ORDER BY 2 DESC) ;

 

查看錶空間只有3GB不算太大，所以採起擴大sysaux表空間對應數據文件爲10G，並繼續觀察空間增加的方式解決。 

alter database datafile 'G:\APP\ADMINISTRATOR\ORADATA\THA11PRODGT\SYSAUX01.DBF' resize 10200 m;

 database datafile 'G:\APP\ADMINISTRATOR\ORADATA\THA11PRODGT\SYSAUX01.DBF'已變動。

 處理後表空間佔用量：

後續該系統扔應關注user表空間是否繼續擴大問題。