（一）根据程序名称查找相关信息
select A.process,B.spid,A.sid,A.serial#,A.sql_address,A.username,A.program,A.status,A.machine,A.terminal,A.osuser
from v$session A, v$process B
--where A.program like '%'||UPPER('&&sBossServiceName')||'%'
where A.program like '%qam%'
-- and A.machine='e6900f1'
and A.paddr = B.addr
order by A.machine,A.sid;
（二）根据程序名称查找当前sql
select * from v$sqltext
where address in (
select A.sql_address
from v$session A, v$process B
--where A.program like '%'||UPPER('&&sBossServiceName')||'%'
where A.program like '%qam%'
-- and A.machine='e6900f1'
and A.paddr = B.addr)
order by address,piece;
--getsql.sql
--通过sid，获取session正在执行的sql语句
SELECT sql_text FROM v$sqltext
WHERE address = (select sql_address from v$session where sid = &sid)
ORDER BY piece;
-----------------------------------------
--pid2sid.sql
（三）通过操作系统的pid查找sid
select * from v$session
where paddr=(select addr from v$process where spid=&spid);
-----------------------------------------
select spid, osuser, s.program
from v$session s,v$process p
where s.paddr=p.addr and s.sid=1057
--sid2pid.sql
（四）通过sid查找spid
select * from v$process
where addr = (select paddr from v$session where sid = &sid);
--killedsessionaddr2pid.sql
--通过招出被kill的session的地址，查找出其对应的操作系统进程ID(spid)
select * from v$process
where addr in (
select p.addr from v$process p where pid <> 1
minus
select s.paddr from v$session s
);
（五）查看锁（lock）情况
select /*+ RULE */ ls.osuser os_user_name, ls.username user_name,
decode(ls.type, 'RW', 'Row wait enqueue lock', 'TM', 'DML enqueue lock', 'TX',
'Transaction enqueue lock', 'UL', 'User supplied lock') lock_type,
o.object_name object, decode(ls.lmode, 1, null, 2, 'Row Share', 3,
'Row Exclusive', 4, 'Share', 5, 'Share Row Exclusive', 6, 'Exclusive', null)
lock_mode, o.owner, ls.sid, ls.serial# serial_num, ls.id1, ls.id2
from sys.dba_objects o, ( select s.osuser, s.username, l.type,
l.lmode, s.sid, s.serial#, l.id1, l.id2 from v$session s,
v$lock l where s.sid = l.sid ) ls where o.object_id = ls.id1 and o.owner
<> 'SYS' order by o.owner, o.object_name;
（六）查看等待（wait）情况
SELECT v$waitstat.class, v$waitstat.count count, SUM(v$sysstat.value) sum_value
FROM v$waitstat, v$sysstat WHERE v$sysstat.name IN ('db block gets',
'consistent gets') group by v$waitstat.class, v$waitstat.count
（七）查看表空间的名称及大小
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;
（八）查看表空间物理文件的名称及大小
select tablespace_name, file_id, file_name,
round(bytes/(1024*1024),0) total_space
from dba_data_files
order by tablespace_name;
（九）查看回滚段名称及大小
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$rollstat v
Where r.segment_id = v.usn(+)
order by segment_name ;
（十）回滚段暂用进程
SELECT r.name 回滚段名,
s.sid,
s.serial#,
s.username 用户名,
s.status,
t.cr_get,
t.phy_io,
t.used_ublk,
t.noundo,
substr(s.program, 1, 78) 操作程序
FROM sys.v_$session s,sys.v_$transaction t,sys.v_$rollname r
WHERE t.addr = s.taddr and t.xidusn = r.usn
AND r.NAME ='UNDOTBS1'
ORDER BY used_ublk DESC
（十一）捕捉运行很久的SQL
select username,sid,opname,
round(sofar*100 / totalwork,0) || '%' as progress,
time_remaining,sql_text
from v$session_longops , v$sql
where time_remaining <> 0
and sql_address = address
and sql_hash_value = hash_value
（十二）耗资源的进程（top session）
select s.schemaname schema_name, decode(sign(48 - command), 1,
to_char(command), 'Action Code #' || to_char(command) ) action, status
session_status, s.osuser os_user_name, s.sid, p.spid , s.serial# serial_num,
nvl(s.username, '[Oracle process]') user_name, s.terminal terminal,
s.program program, st.value criteria_value from v$sesstat st, v$session s , v$process p
where st.sid = s.sid and st.statistic# = to_number('38') and ('ALL' = 'ALL'
or s.status = 'ALL') and p.addr = s.paddr order by st.value desc, p.spid asc, s.username asc, s.osuser asc
（十三）查看有哪些用户连接
select s.osuser os_user_name, decode(sign(48 - command), 1, to_char(command),
'Action Code #' || to_char(command) ) action, p.program oracle_process,
status session_status, s.terminal terminal, s.program program,
s.username user_name, s.fixed_table_sequence activity_meter, '' query,
0 memory, 0 max_memory, 0 cpu_usage, s.sid, s.serial# serial_num
from v$session s, v$process p where s.paddr=p.addr and s.type = 'USER'
order by s.username, s.osuser