Oracle資料庫滿了修改的過程20171123

查看錶空間的使用方式

SELECT Upper(F.TABLESPACE_NAME)         "資料表空間名",       D.TOT_GROOTTE_MB                 "資料表空間大小(M)",       D.TOT_GROOTTE_MB - F.TOTAL_BYTES "已使用空間(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                    "空閑空間(M)",       F.MAX_BYTES                      "最大塊(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) DWHERE  D.TABLESPACE_NAME = F.TABLESPACE_NAMEORDER  BY 1

查看各個資料表空間的資料檔案

select t1.name, t2.name,Round(t2.BYTES / ( 1024 * 1024 ), 2) "大小(M)"  from v$tablespace t1, v$datafile t2 where t1.ts# = t2.ts# order by 1,3

查看SYSAUX資料表空間使用方式

SELECT *  FROM (SELECT   BYTES, segment_name, segment_type, owner            FROM dba_segments           WHERE tablespace_name = 'SYSAUX'        ORDER BY BYTES DESC) WHERE ROWNUM < 10 ```執行以下語句 修改表資料檔案大小

SQL> select dbms_stats.get_stats_history_retention from dual;

GET_STATS_HISTORY_RETENTION---------------------------                         31 ```SQL> exec dbms_stats.alter_stats_history_retention(15); ```PL/SQL procedure successfully completed ```SQL> select min(snap_id),max(snap_id) from dba_hist_snapshot; ```MIN(SNAP_ID) MAX(SNAP_ID)------------ ------------       35044        35248 ```SQL> exec dbms_workload_repository.drop_snapshot_range(low_snap_id =>35044,high_snap_id => 35044+24); ```PL/SQL procedure successfully completed修改表資料檔案大小 ```SQL> ALTER DATABASE DATAFILE 'D:\APP\ADMINISTRATOR\ORADATA\XUEJIAYUE\SYSAUX01.DBF' RESIZE 2048M;

Database altered

SQL> ALTER DATABASE DATAFILE 'D:\APP\ADMINISTRATOR\ORADATA\XUEJIAYUE\XUEJIAYUE01.DBF' RESIZE 2048M; 

SQL>

Database altered

ALTER DATABASE DATAFILE 'D:\APP\ADMINISTRATOR\ORADATA\XUEJIAYUE\UNDOTBS01.DBF' RESIZE 2048M;

看看效率比較低的語句（http://blog.csdn.net/ocean1010/article/details/5947580）

SELECT EXECUTIONS , DISK_READS, BUFFER_GETS, ROUND((BUFFER_GETS-DISK_READS)/BUFFER_GETS,2) Hit_radio, ROUND(DISK_READS/EXECUTIONS,2) Reads_per_run, SQL_TEXT FROM V$SQLAREA WHERE EXECUTIONS>0 AND BUFFER_GETS > 0 AND (BUFFER_GETS-DISK_READS)/BUFFER_GETS < 0.8 ORDER BY 4 DESC;

然後
最佳化相關的表格