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Oracle 查看表空间的大小及使用情况sql语句
1、查看表空间的名称及大小
SELECT t.tablespace_name,round(SUM(bytes / (1024 * 1024)),0) ts_size
FROM dba_tablespaces t,dba_data_files d
WHERE t.tablespace_name = d.tablespace_name
GROUP BY t.tablespace_name;
TABLESPACE_NAME TS_SIZE
-------------------------------------------------- ----------
UNDOTBS1 655
SYSAUX 870
TBS1 10
USERS 46
SYSTEM 780
2、查看表空间物理文件的名称及大小
SELECT tablespace_name,
file_id,
file_name,
round(bytes / (1024 * 1024),0) total_space
FROM dba_data_files
ORDER BY tablespace_name;
TABLESPACE_NAME FILE_ID
-------------------------------------------------- ----------
FILE_NAME TOTAL_SPACE
-------------------------------------------------- -----------
SYSAUX ##########
/opt/oracle/app/oradata/orcl/sysaux01.dbf 870
SYSTEM ##########
/opt/oracle/app/oradata/orcl/system01.dbf 780
TBS1 ##########
/home/oracle/tbs01 10
UNDOTBS1 ##########
/opt/oracle/app/oradata/orcl/undotbs01.dbf 655
USERS ##########
/opt/oracle/app/oradata/orcl/users01.dbf 46
3、查看回滚段名称及大小
SELECT segment_name,
tablespace_name,
r.status,
(initial_extent / 1024) initialextent,
(next_extent / 1024) nextextent,
max_extents,
v.curext curextent
FROM dba_rollback_segs r,v$rollstat v
WHERE r.segment_id = v.usn(+)
ORDER BY segment_name;
4、查看控制文件
SELECT NAME FROM v$controlfile;
NAME
--------------------------------------------------
/opt/oracle/app/oradata/orcl/control01.ctl
/opt/oracle/app/oradata/orcl/control02.ctl
5、查看日志文件
SELECT MEMBER FROM v$logfile;
SQL> SELECT MEMBER FROM v$logfile;
MEMBER
----------------------------------------------------------------------------------------------------
/opt/oracle/app/oradata/orcl/redo03.log
/opt/oracle/app/oradata/orcl/redo02.log
/opt/oracle/app/oradata/orcl/redo01.log
/opt/oracle/app/oradata/orcl/redo04.log
/opt/oracle/app/redo01b.log
/opt/oracle/app/redo02b.log
/opt/oracle/app/redo03b.log
/opt/oracle/app/redo04b.log
8 rows selected.
Elapsed: 00:00:00.00
6、查看表空间的使用情况
SELECT SUM(bytes) / (1024 * 1024) AS free_space,tablespace_name
FROM dba_free_space
GROUP BY tablespace_name;
SELECT a.tablespace_name,
a.bytes total,
b.bytes used,
c.bytes free,
(b.bytes * 100) / a.bytes "% USED ",
(c.bytes * 100) / a.bytes "% FREE "
FROM sys.sm$ts_avail a,sys.sm$ts_used b,sys.sm$ts_free c
WHERE a.tablespace_name = b.tablespace_name
AND a.tablespace_name = c.tablespace_name;
TABLESPACE_NAME TOTAL USED FREE % USED
-------------------------------------------------- ---------- ---------- ---------- ----------
% FREE
----------
SYSAUX 912261120 851181568 60030976 93.3045977
6.58045977
UNDOTBS1 686817280 11796480 673972224 1.71755725
98.129771
USERS 48496640 44040192 3407872 90.8108108
7.02702703
SYSTEM 817889280 816775168 65536 99.8637821
.008012821
Elapsed: 00:00:00.15
7、查看数据库库对象
SELECT owner,object_type,status,COUNT(*) count#
FROM all_objects
GROUP BY owner,status;
8、查看数据库的版本
SELECT version
FROM product_component_version
WHERE substr(product,1,6) = 'Oracle';
VERSION
----------------------------------------------------------------------------------------------------
11.2.0.1.0
9、查看数据库的创建日期和归档方式
SELECT created,log_mode,log_mode FROM v$database;
SQL> SELECT created,log_mode FROM v$database;
CREATED LOG_MODE LOG_MODE
--------- ------------ ------------
23-MAY-16 NOARCHIVELOG NOARCHIVELOG
Elapsed: 00:00:00.00
备注:
--1G=1024MB --1M=1024KB --1K=1024Bytes --1M=11048576Bytes --1G=1024*11048576Bytes=11313741824Bytes SELECT a.tablespace_name "表空间名",total "表空间大小",free "表空间剩余大小",(total - free) "表空间使用大小",total / (1024 * 1024 * 1024) "表空间大小(G)",free / (1024 * 1024 * 1024) "表空间剩余大小(G)",(total - free) / (1024 * 1024 * 1024) "表空间使用大小(G)",round((total - free) / total,4) * 100 "使用率 %" FROM (SELECT tablespace_name,SUM(bytes) free FROM dba_free_space GROUP BY tablespace_name) a,(SELECT tablespace_name,SUM(bytes) total FROM dba_data_files GROUP BY tablespace_name) b WHERE a.tablespace_name = b.tablespace_name （编辑：李大同）
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