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;
select a.tablespace_name, a.bytes / 1024 / 1024 "Sum MB", (a.bytes - b.bytes) / 1024 / 1024 "used MB", b.bytes / 1024 / 1024 "free MB", round(((a.bytes - b.bytes) / a.bytes) * 100, 2) "percent_used" from (select tablespace_name, sum(bytes) bytes from dba_data_files group by tablespace_name) a, (select tablespace_name, sum(bytes) bytes, max(bytes) largest from dba_free_space group by tablespace_name) b where a.tablespace_name = b.tablespace_name order by ((a.bytes - b.bytes) / a.bytes) desc; 2.查看表空间使用率
3.查看表空间物理文件的名称及大小
select tablespace_name, file_id, file_name, STATUS, ONLINE_STATUS, round(bytes / (1024 * 1024), 0) total_space from dba_data_files order by tablespace_name;
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$rollstat v Where r.segment_id = v.usn(+) order by segment_name; 4.查看回滚段名称及大小
select file_name,tablespace_name,autoextensible from dba_data_files
6.监控表空间的 I/O 比例 select df.tablespace_name name, df.file_name "file", f.phyrds pyr, f.phyblkrd pbr, f.phywrts pyw, f.phyblkwrt pbw from v$filestat f, dba_data_files df where f.file# = df.file_id order by df.tablespace_name;