Oracle 回滚段

--查询数据文件

select t.TABLESPACE_NAME, --表空间名
   t.FILE_NAME, --文件名
   t.AUTOEXTENSIBLE, --是否自动扩展
   t.BYTES / 1024 / 1024 as tsize, --表空间初始大小
   t.MAXBYTES / 1024 / 1024 msize, --表空间最大扩展到多少
   b.CONTENTS, --表空间类型
   b.EXTENT_MANAGEMENT --表空间管理模式
from dba_temp_files t, dba_tablespaces b
where t.TABLESPACE_NAME = b.TABLESPACE_NAME

--查询曾经的最大使用率

SELECT D.TABLESPACE_NAME,SPACE "SUM_SPACE(M)",BLOCKS SUM_BLOCKS, 
   USED_SPACE "USED_SPACE(M)",ROUND(NVL(USED_SPACE,0)/SPACE*100,2) "USED_RATE(%)",
   NVL(FREE_SPACE,0) "FREE_SPACE(M)"
FROM 
(SELECT TABLESPACE_NAME,ROUND(SUM(BYTES)/(1024*1024),2) SPACE,SUM(BLOCKS) BLOCKS
        FROM DBA_TEMP_FILES GROUP BY TABLESPACE_NAME) D,
(SELECT TABLESPACE_NAME,ROUND(SUM(BYTES_USED)/(1024*1024),2) USED_SPACE,
        ROUND(SUM(BYTES_FREE)/(1024*1024),2) FREE_SPACE
        FROM V$TEMP_SPACE_HEADER GROUP BY TABLESPACE_NAME) F
WHERE  D.TABLESPACE_NAME = F.TABLESPACE_NAME(+)

--查询当前的使用率

SELECT D.tablespace_name,
   SPACE "SUM_SPACE(M)",
   blocks "SUM_BLOCKS",
   used_space "USED_SPACE(M)",
   Round(Nvl(used_space, 0) / SPACE * 100, 2) "USED_RATE(%)",
   SPACE - used_space "FREE_SPACE(M)"
FROM (SELECT tablespace_name,
           Round(SUM(bytes) / (1024 * 1024), 2) SPACE,
           SUM(blocks) BLOCKS
      FROM dba_temp_files
     GROUP BY tablespace_name) D,
   (SELECT tablespace,
           Round(SUM(blocks * 8192) / (1024 * 1024), 2) USED_SPACE
      FROM v$sort_usage
     GROUP BY tablespace) F
WHERE D.tablespace_name = F.tablespace(+)
AND D.tablespace_name in ("TEMP")

--增加表空间

ALTER TABLESPACE  temp add tempFILE "+SSDDG/SEA/TEMPFILE/temp061" SIZE 32000M;