檢視資料表空間
select t.tablespace_name,t.bytes,t.blocks,t.autoextensible,t.maxbytes,t.file_name from dba_data_files t;
select * from v$datafile;
select upper(f.tablespace_name) "表空間名",
d.tot_grootte_mb "表空間大小(m)",
d.tot_grootte_mb - f.total_bytes "已使用空間(m)",
to_char(round((d.tot_grootte_mb - f.total_bytes) / d.tot_grootte_mb * 100,2),'990.99') "使用比",
f.total_bytes "空閒空間(m)",
f.max_bytes "最大塊(m)"
from (select tablespace_name,
round(sum(bytes) / (1024 * 1024), 2) total_bytes,
round(max(bytes) / (1024 * 1024), 2) max_bytes
from sys.dba_free_space
group by tablespace_name) f,
(select dd.tablespace_name,
round(sum(dd.bytes) / (1024 * 1024), 2) tot_grootte_mb
from sys.dba_data_files dd
group by dd.tablespace_name) d
where d.tablespace_name = f.tablespace_name
order by 4 desc;
此錯誤是報oracle的表空間大小不足。首先檢視所有表空間的大小:
select t.tablespace_name, round(sum(bytes/(1024 * 1024)), 0) ts_size
from dba_tablespaces t, dba_data_files d
where t.tablespace_name = d.tablespace_name
group by t.tablespace_name;
然後查詢要修改的表空間的資料檔名:select file_name,blocks,tablespace_name
from dba_data_files
將對應表空間的dpf檔案路徑記下來。比如『/opt/oracle/oradata/test/test.dbf』
最後修改表空間資料檔案:
alter database datafile '/opt/oracle/oradata/test/test.dbf' resize 2000m
查詢新建使用者
select username
from dba_users
where username not in
('text', 'rman_user', 'test', 'scott', 'tsmsys', 'mddata', 'dip',
'dbsnmp', 'sysman', 'mdsys', 'ordsys', 'exfsys', 'dmsys', 'wmsys',
'ctxsys', 'anonymous', 'xdb', 'ordplugins', 'si_informtn_schema',
'olapsys', 'mgmt_view', 'sys', 'system', 'outln');
查詢那些使用者,操縱了那些表造成了鎖機
select s.username,
decode(l.type,'tm','table lock',
'tx','row lock',
null) lock_level,
o.owner,o.object_name,o.object_type,
s.sid,s.serial#,s.terminal,s.machine,s.program,s.osuser
from v$session s,v$lock l,all_objects o
where l.sid = s.sid
and l.id1 = o.object_id(+)
and s.username is not null
其中 tm 為表鎖定 tx 為行鎖定
看鎖阻塞的方法是
select (select username from v$session where sid=a.sid) blocker,
a.sid,
'is blocking',
(select username from v$session where sid=b.sid) blockee,
b.sid
from v$lock a, v$lock b
where a.block = 1
and b.request > 0
and a.id1 = b.id1
and a.id2 = b.id2
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