查看Oracle数据库中表空间信息的命令方法
select 1.未使用的表空间大小 3.查询所有的表空间 select tablespace_name from dba_tablespaces; 4.在oracle数据库中,临时表空间主要用于用户在使用order by 、group by语句进行排序和汇总时所需的临时工作空间。要查询数据库中临时表空间的名称,大小及数据文件,可以查询数据字典dba_tablespaces及dba_data_files。命令如下: select a.tablespace_name space_name,b.bytes bytes,b.file_name filename from dba_tablespaces a,dba_data_files b where a.tablespace_name=b.tablespace_name and a.contents='TEMPORARY'; 5.查看Oracle数据库中表空间信息的命令方法: select a.a1 space_name,c.c2 type,c.c3 quM,b.b2/1024/1024 space_size, (b.b2-a.a2)/1024/1024 used,substr((b.b2-a.a2)/b.b2*100,1,5) rating from (select tablespace_name a1,sum(nvl(bytes,0)) a2 from dba_free_space group by tablespace_name) a, (select tablespace_name b1,sum(bytes) b2 from dba_data_files group by tablespace_name) b, (select tablespace_name c1,contents c2,extent_management c3 from dba_tablespaces) c where a.a1=b.b1 and c.c1=b.b1; 6.查看Oracle数据库中表空间使用情况的命令方法: SELECT upper(f.tablespace_name) "Tablespacename", 1.查看临时表空间使用情况: SELECT d.status "Status",d.tablespace_name "Name",d.contents "Type", d.extent_management "Extent Management", TO_CHAR(NVL(a.bytes / 1024 / 1024,0),'99,999,990.900') "Size (M)", NVL(t.bytes,0)/1024/1024 ||'/'||NVL(a.bytes/1024/1024,0) "Used (M)", TO_CHAR(NVL(t.bytes / a.bytes * 100,'990.00') "Used %" FROM sys.dba_tablespaces d, (select tablespace_name,sum(bytes) bytes from dba_temp_files group by tablespace_name) a,sum(bytes_cached) bytes from v$temp_extent_pool group by tablespace_name) t WHERE d.tablespace_name = a.tablespace_name(+) AND d.tablespace_name = t.tablespace_name(+) AND d.extent_management like 'LOCAL' AND d.contents like 'TEMPORARY'; 从oracle 9i开始,可以创建Temporary tablespace类表空间,即“临时“表空间,这类表空间使用临时文件。临时文件的信息被存储在数据字典V$tempfile中。命令如下: select file#,status,name from v$tempfile; 2.查询oracle系统用户的默认表空间和临时表空间 select default_tablespace,temporary_tablespace from dba_users; --------------------------------------------------- 3.分享: 如何查找正在使用临时表空间的session/sqltext --------------------------------------------------- select a.username,a.sid,a.serial#,a.process, b.tablespace,b.segtype,b.userblocks, d.current_users,d.total_blocks,d.used_blocks,d.free_blocks, d.max_used_blocks,d.max_sort_blocks, e.physizemb,e.phyblocks,round(d.max_used_blocks/e.phyblocks*100,2) max_used_ratio, round(d.used_blocks/e.phyblocks*100,2) current_used_ratio, round(b.userblocks/e.phyblocks*100,2) user_ratio, c.sql_text from v$session a, (select session_addr,tablespace,segtype,sum(blocks) userblocks from v$tempseg_usage group by session_addr,segtype) b, v$sqltext c, v$sort_segment d,round(sum(bytes)/1024/1024,2) physizemb,sum(blocks) phyblocks from dba_temp_files group by tablespace_name) e where a.saddr = b.session_addr and a.sql_address = c.address and a.sql_hash_value = c.hash_value and c.piece = 0 and b.tablespace = d.tablespace_name and b.tablespace = e.tablespace_name; 4.查询用户表空间的表 select * from user_tables; 获取创建表空间的语句:
--6如果删除表空间数据文件,如下: (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |