--檢視某錶的大小--
select sum(bytes) / (1024 * 1024) as "size(m)"
from user_segments
where segment_name = upper('tbl_mo_part_00');
--檢視索引個數和類別 --
select index_name, index_type, table_name, t.sample_size
from user_indexes t
order by table_name;
--檢視索引的大小 --
select sum(bytes) / (1024 * 1024) as "size(m)"
from user_segments
where segment_name = upper('tbl_mo_part_01');
--檢視表空間的使用情況 和 物理空間大小--
select t.tablespace_name,d.file_name,sum(t.bytes)/(1024*1024) as "free_space(m)",round(d.bytes/(1024*1024),0) "total_space(m)"
from dba_free_space t, dba_data_files d
where t.tablespace_name = d.tablespace_name
group by t.tablespace_name,d.file_name,d.bytes;
--下面的語句用來查詢哪些物件被鎖--
select object_name,machine,s.sid,s.serial# from v$locked_object l,dba_objects o, v$session s
where l.object_id = o.object_id and l.session_id = s.sid;
--殺死乙個被鎖的程序，要用到上面的結果
alter system kill session 'sid';
--檢視鎖表程序
select * from v$session t1, v$locked_object t2 where t1.sid = t2.session_id;
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