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Oracle临时表空间的增删改查

时间:2021-07-01 10:21:17 帮助过:50人阅读

1、查看临时表空间 (dba_temp_files视图)(v_$tempfile视图)select tablespace_name,file_name,bytes/1024/1024 file_size,au

1、查看临时表空间 (dba_temp_files视图)(v_$tempfile视图)
select tablespace_name,file_name,bytes/1024/1024 file_size,autoextensible from dba_temp_files;
select status,enabled, name, bytes/1024/1024 file_size from v_$tempfile;--sys用户查看

2、缩小临时表空间大小
alter database tempfile 'D:\Oracle\PRODUCT\10.2.0\ORADATA\TELEMT\TEMP01.DBF' resize 100M;

3、扩展临时表空间:
方法一、增大临时文件大小:
SQL> alter database tempfile ‘/u01/app/oracle/oradata/orcl/temp01.dbf’ resize 100m;
方法二、将临时数据文件设为自动扩展:
SQL> alter database tempfile ‘/u01/app/oracle/oradata/orcl/temp01.dbf’ autoextend on next 5m maxsize unlimited;
方法三、向临时表空间中添加数据文件:
SQL> alter tablespace temp add tempfile ‘/u01/app/oracle/oradata/orcl/temp02.dbf’ size 100m;

4、创建临时表空间:
SQL> create temporary tablespace temp1 tempfile ‘/u01/app/oracle/oradata/orcl/temp11.dbf’ size 10M;

5、更改系统的默认临时表空间:
--查询默认临时表空间
select * from database_properties where property_name='DEFAULT_TEMP_TABLESPACE';
--修改默认临时表空间
alter database default temporary tablespace temp1;
所有用户的默认临时表空间都将切换为新的临时表空间:
select username,temporary_tablespace,default_ from dba_users;
--更改某一用户的临时表空间:
alter user scott temporary tablespace temp;

6、删除临时表空间
删除临时表空间的一个数据文件:
SQL> alter database tempfile ‘/u01/app/oracle/oradata/orcl/temp02.dbf’ drop;
删除临时表空间(彻底删除):
SQL> drop tablespace temp1 including contents and datafiles cascade constraints;

7、查看临时表空间的使用情况(GV_$TEMP_SPACE_HEADER视图必须在sys用户下才能查询)
GV_$TEMP_SPACE_HEADER视图记录了临时表空间的使用大小与未使用的大小
dba_temp_files视图的bytes字段记录的是临时表空间的总大小
SELECT temp_used.tablespace_name,
total - used as "Free",
total as "Total",
round(nvl(total - used, 0) * 100 / total, 3) "Free percent"
FROM (SELECT tablespace_name, SUM(bytes_used) / 1024 / 1024 used
FROM GV_$TEMP_SPACE_HEADER
GROUP BY tablespace_name) temp_used,
(SELECT tablespace_name, SUM(bytes) / 1024 / 1024 total
FROM dba_temp_files
GROUP BY tablespace_name) temp_total
WHERE temp_used.tablespace_name = temp_total.tablespace_name

8、查找消耗资源比较的sql语句
Select se.username,
se.sid,
su.extents,
su.blocks * to_number(rtrim(p.value)) as Space,
tablespace,
segtype,
sql_text
from v$sort_usage su, v$parameter p, v$session se, v$sql s
where p.name = 'db_block_size'
and su.session_addr = se.saddr
and s.hash_value = su.sqlhash
and s.address = su.sqladdr
order by se.username, se.sid

9、查看当前临时表空间使用大小与正在占用临时表空间的sql语句
select sess.SID, segtype, blocks * 8 / 1000 "MB", sql_text
from v$sort_usage sort, v$session sess, v$sql sql
where sort.SESSION_ADDR = sess.SADDR
and sql.ADDRESS = sess.SQL_ADDRESS
order by blocks desc;

10、临时表空间组介绍
1)创建临时表空间组:
create temporary tablespace tempts1 tempfile '/home/oracle/temp1_02.dbf' size 2M tablespace group group1;
create temporary tablespace tempts2 tempfile '/home/oracle/temp2_02.dbf' size 2M tablespace group group2;

2)查询临时表空间组:dba_tablespace_groups视图
select * from dba_tablespace_groups;
GROUP_NAME TABLESPACE_NAME
------------------------------ ------------------------------
GROUP1 TEMPTS1
GROUP2 TEMPTS2

3)将表空间从一个临时表空间组移动到另外一个临时表空间组:
alter tablespace tempts1 tablespace group GROUP2 ;
select * from dba_tablespace_groups;

GROUP_NAME TABLESPACE_NAME
------------------------------ ------------------------------
GROUP2 TEMPTS1
GROUP2 TEMPTS2

4)把临时表空间组指定给用户
alter user scott temporary tablespace GROUP2;

5)在数据库级设置临时表空间
alter database default temporary tablespace GROUP2;

6)删除临时表空间组 (删除组成临时表空间组的所有临时表空间)
drop tablespace tempts1 including contents and datafiles;
select * from dba_tablespace_groups;
GROUP_NAME TABLESPACE_NAME
------------------------------ ------------------------------
GROUP2 TEMPTS2

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