Oracle数据库慢查看数据库

8、关于v$session

在查询 v$session 视图的时候，我们根据command字段内部表示解码每一个字段，当我们需要快速找出他们的 Oracle 系统的内部情况时非常有用。

select

substr(s.username,1,18) username,substr(s.program,1,15) program,p.spid,s.process,

decode(s.command,

0,No Command,

1,Create Table,

2,Insert,

3,Select,

6,Update,

7,Delete,

9,Create Index,

15,Alter Table,

21,Create View,

23,Validate Index,

35,Alter Database,

39,Create Tablespace,

41,Drop Tablespace,

40,Alter Tablespace,

53,Drop User,

62,Analyze Table,

63,Analyze Index,

s.command||: Other) command

from

v$session s,

v$process p,

v$transaction t,

v$rollstat r,

v$rollname n

where s.paddr = p.addr

and s.taddr = t.addr (+)

and t.xidusn = r.usn (+)

and r.usn = n.usn (+)

order by username

（3）几个相关的SQL

--查看系统进程对应的信息

select se.saddr,se.sid,se.serial#,p.pid,se.paddr,s.sql_id,s.sql_text

from v$session se ,v$process p, v$sqlarea s

where se.paddr=p.addr and se.sql_address=s.address and se.process=&1

      and se.username is not null

--查看所有的会话

select se.username,se.saddr,se.sid,se.serial#,se.process,s.sql_id

from v$session se,v$sqlarea s

where se.sql_address=s.address

--查看会话对应的sql内容

select se.username,se.process,s.sql_text

from v$session se,v$sqlarea s

where se.sql_address=s.address and s.sql_id=&1