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Oracle数据库维护常用的SQL代码示例(1)
2011-8-29 10:38:00
文章摘要:Oracle数据库维护是作为一名数据库管理员必须要掌握的技能。数据库维护的操作有很多种，本文我们总结了18种常用的数据库维护操作的SQL代码示例，接下来就让我们一起来了解一下这部分内容吧。 1、求当前会话的SID，SERIAL# 1SELECTSid,Serial# 2FROMV$session 3 ...
Oracle数据库维护是作为一名数据库管理员必须要掌握的技能。数据库维护的操作有很多种，本文我们总结了18种常用的数据库维护操作的SQL代码示例，接下来就让我们一起来了解一下这部分内容吧。
1、求当前会话的SID，SERIAL#
1 SELECT Sid, Serial#
2 FROM V$session
3 WHERE Audsid = Sys_Context(’USERENV’, ’SESSIONID’);
2、查询session的OS进程ID
4 SELECT p.Spid "OS Thread", b.NAME "Name-User", s.Program, s.Sid, s.Serial#,
5 s.Osuser, s.Machine
6 FROM V$process p, V$session s, V$bgprocess b
7 WHERE p.Addr = s.Paddr
8 AND p.Addr = b.Paddr
9 And (s.sid=&1 or p.spid=&1)
10 UNION ALL
11 SELECT p.Spid "OS Thread", s.Username "Name-User", s.Program, s.Sid,
12 s.Serial#, s.Osuser, s.Machine
13 FROM V$process p, V$session s
14 WHERE p.Addr = s.Paddr
15 And (s.sid=&1 or p.spid=&1)
16 AND s.Username IS NOT NULL;
3、根据sid查看对应连接正在运行的sql
17 SELECT /*+ PUSH_SUBQ */
18 Command_Type, Sql_Text, Sharable_Mem, Persistent_Mem, Runtime_Mem, Sorts,
19 Version_Count, Loaded_Versions, Open_Versions, Users_Opening, Executions,
20 Users_Executing, Loads, First_Load_Time, Invalidations, Parse_Calls,
21 Disk_Reads, Buffer_Gets, Rows_Processed, SYSDATE Start_Time,
22 SYSDATE Finish_Time, ’>’ || Address Sql_Address, ’N’ Status
23 FROM V$sqlarea
24 WHERE Address = (SELECT Sql_Address
25 FROM V$session
26 WHERE Sid = &sid );
4、查找object为哪些进程所用
27 SELECT p.Spid, s.Sid, s.Serial# Serial_Num, s.Username User_Name,
28 a.TYPE Object_Type, s.Osuser Os_User_Name, a.Owner,
29 a.OBJECT Object_Name,
30 Decode(Sign(48 - Command), 1, To_Char(Command), ’Action Code #’ || To_Char(Command)) Action,
31 p.Program Oracle_Process, s.Terminal Terminal, s.Program Program,
32 s.Status Session_Status
33 FROM V$session s, V$access a, V$process p
34 WHERE s.Paddr = p.Addr
35 AND s.TYPE = ’USER’
36 AND a.Sid = s.Sid
37 AND a.OBJECT = ’&obj’
38 ORDER BY s.Username, s.Osuser
5、查看有哪些用户连接
39 SELECT s.Osuser Os_User_Name,
40 Decode(Sign(48 - Command),1,To_Char(Command),
41 ’Action Code #’ || To_Char(Command)) Action,
42 p.Program Oracle_Process, Status Session_Status, s.Terminal Terminal,
43 s.Program Program, s.Username User_Name,
44 s.Fixed_Table_Sequence Activity_Meter, ’’ Query, 0 Memory,
45 0 Max_Memory, 0 Cpu_Usage, s.Sid, s.Serial# Serial_Num
46 FROM V$session s, V$process p
47 WHERE s.Paddr = p.Addr
48 AND s.TYPE = ’USER’
49 ORDER BY s.Username, s.Osuser
6、根据v.sid查看对应连接的资源占用等情况
50 SELECT n.NAME, v.VALUE, n.CLASS, n.Statistic#
51 FROM V$statname n, V$sesstat v
52 WHERE v.Sid = &sid
53 AND v.Statistic# = n.Statistic#
54 ORDER BY n.CLASS, n.Statistic#
7、查询耗资源的进程（top session）
55 SELECT s.Schemaname Schema_Name,
56 Decode(Sign(48 - Command),
57 1, To_Char(Command), ’Action Code #’ || To_Char(Command)) Action,
58 Status Session_Status, s.Osuser Os_User_Name, s.Sid, p.Spid,
59 s.Serial# Serial_Num, Nvl(s.Username, ’[Oracle process]’) User_Name,
60 s.Terminal Terminal, s.Program Program, St.VALUE Criteria_Value
61 FROM V$sesstat St, V$session s, V$process p
62 WHERE St.Sid = s.Sid
63 AND St.Statistic# = To_Number(’38’)
64 AND (’ALL’ = ’ALL’ OR s.Status = ’ALL’)
65 AND p.Addr = s.Paddr
66 ORDER BY St.VALUE DESC, p.Spid ASC, s.Username ASC, s.Osuser ASC
8、查看锁（lock）情况
67 SELECT /*+ RULE */
68 Ls.Osuser Os_User_Name, Ls.Username User_Name,
69 Decode(Ls.TYPE,
70 ’RW’, ’Row wait enqueue lock’, ’TM’, ’DML enqueue lock’,
71 ’TX’, ’Transaction enqueue lock’, ’UL’, ’User supplied lock’) Lock_Type,
72 o.Object_Name OBJECT,
73 Decode(Ls.Lmode,
74 1, NULL, 2, ’Row Share’, 3, ’Row Exclusive’,
75 4, ’Share’, 5, ’Share Row Exclusive’, 6, ’Exclusive’,
76 NULL) Lock_Mode,
77 o.Owner, Ls.Sid, Ls.Serial# Serial_Num, Ls.Id1, Ls.Id2
78 FROM Sys.Dba_Objects o,
79 (SELECT s.Osuser, s.Username, l.TYPE, l.Lmode, s.Sid, s.Serial#, l.Id1,
80 l.Id2
81 FROM V$session s, V$lock l
82 WHERE s.Sid = l.Sid) Ls
83 WHERE o.Object_Id = Ls.Id1
84 AND o.Owner <> ’SYS’
85 ORDER BY o.Owner, o.Object_Name
9、查看等待（wait）情况
86 SELECT Ws.CLASS, Ws.COUNT COUNT, SUM(Ss.VALUE) Sum_Value
87 FROM V$waitstat Ws, V$sysstat Ss
88 WHERE Ss.NAME IN (’db block gets’, ’consistent gets’)
89 GROUP BY Ws.CLASS, Ws.COUNT
1、求当前会话的SID，SERIAL#
1 SELECT Sid, Serial#
2 FROM V$session
3 WHERE Audsid = Sys_Context(’USERENV’, ’SESSIONID’);
2、查询session的OS进程ID
4 SELECT p.Spid "OS Thread", b.NAME "Name-User", s.Program, s.Sid, s.Serial#,
5 s.Osuser, s.Machine
6 FROM V$process p, V$session s, V$bgprocess b
7 WHERE p.Addr = s.Paddr
8 AND p.Addr = b.Paddr
9 And (s.sid=&1 or p.spid=&1)
10 UNION ALL
11 SELECT p.Spid "OS Thread", s.Username "Name-User", s.Program, s.Sid,
12 s.Serial#, s.Osuser, s.Machine
13 FROM V$process p, V$session s
14 WHERE p.Addr = s.Paddr
15 And (s.sid=&1 or p.spid=&1)
16 AND s.Username IS NOT NULL;
3、根据sid查看对应连接正在运行的sql
17 SELECT /*+ PUSH_SUBQ */
18 Command_Type, Sql_Text, Sharable_Mem, Persistent_Mem, Runtime_Mem, Sorts,
19 Version_Count, Loaded_Versions, Open_Versions, Users_Opening, Executions,
20 Users_Executing, Loads, First_Load_Time, Invalidations, Parse_Calls,
21 Disk_Reads, Buffer_Gets, Rows_Processed, SYSDATE Start_Time,
22 SYSDATE Finish_Time, ’>’ || Address Sql_Address, ’N’ Status
23 FROM V$sqlarea
24 WHERE Address = (SELECT Sql_Address
25 FROM V$session
26 WHERE Sid = &sid );
4、查找object为哪些进程所用
27 SELECT p.Spid, s.Sid, s.Serial# Serial_Num, s.Username User_Name,
28 a.TYPE Object_Type, s.Osuser Os_User_Name, a.Owner,
29 a.OBJECT Object_Name,
30 Decode(Sign(48 - Command), 1, To_Char(Command), ’Action Code #’ || To_Char(Command)) Action,
31 p.Program Oracle_Process, s.Terminal Terminal, s.Program Program,
32 s.Status Session_Status
33 FROM V$session s, V$access a, V$process p
34 WHERE s.Paddr = p.Addr
35 AND s.TYPE = ’USER’
36 AND a.Sid = s.Sid
37 AND a.OBJECT = ’&obj’
38 ORDER BY s.Username, s.Osuser
5、查看有哪些用户连接
39 SELECT s.Osuser Os_User_Name,
40 Decode(Sign(48 - Command),1,To_Char(Command),
41 ’Action Code #’ || To_Char(Command)) Action,
42 p.Program Oracle_Process, Status Session_Status, s.Terminal Terminal,
43 s.Program Program, s.Username User_Name,
44 s.Fixed_Table_Sequence Activity_Meter, ’’ Query, 0 Memory,
45 0 Max_Memory, 0 Cpu_Usage, s.Sid, s.Serial# Serial_Num
46 FROM V$session s, V$process p
47 WHERE s.Paddr = p.Addr
48 AND s.TYPE = ’USER’
49 ORDER BY s.Username, s.Osuser
6、根据v.sid查看对应连接的资源占用等情况
50 SELECT n.NAME, v.VALUE, n.CLASS, n.Statistic#
51 FROM V$statname n, V$sesstat v
52 WHERE v.Sid = &sid
53 AND v.Statistic# = n.Statistic#
54 ORDER BY n.CLASS, n.Statistic#
7、查询耗资源的进程（top session）
55 SELECT s.Schemaname Schema_Name,
56 Decode(Sign(48 - Command),
57 1, To_Char(Command), ’Action Code #’ || To_Char(Command)) Action,
58 Status Session_Status, s.Osuser Os_User_Name, s.Sid, p.Spid,
59 s.Serial# Serial_Num, Nvl(s.Username, ’[Oracle process]’) User_Name,
60 s.Terminal Terminal, s.Program Program, St.VALUE Criteria_Value
61 FROM V$sesstat St, V$session s, V$process p
62 WHERE St.Sid = s.Sid
63 AND St.Statistic# = To_Number(’38’)
64 AND (’ALL’ = ’ALL’ OR s.Status = ’ALL’)
65 AND p.Addr = s.Paddr
66 ORDER BY St.VALUE DESC, p.Spid ASC, s.Username ASC, s.Osuser ASC
8、查看锁（lock）情况
67 SELECT /*+ RULE */
68 Ls.Osuser Os_User_Name, Ls.Username User_Name,
69 Decode(Ls.TYPE,
70 ’RW’, ’Row wait enqueue lock’, ’TM’, ’DML enqueue lock’,
71 ’TX’, ’Transaction enqueue lock’, ’UL’, ’User supplied lock’) Lock_Type,
72 o.Object_Name OBJECT,
73 Decode(Ls.Lmode,
74 1, NULL, 2, ’Row Share’, 3, ’Row Exclusive’,
75 4, ’Share’, 5, ’Share Row Exclusive’, 6, ’Exclusive’,
76 NULL) Lock_Mode,
77 o.Owner, Ls.Sid, Ls.Serial# Serial_Num, Ls.Id1, Ls.Id2
78 FROM Sys.Dba_Objects o,
79 (SELECT s.Osuser, s.Username, l.TYPE, l.Lmode, s.Sid, s.Serial#, l.Id1,
80 l.Id2
81 FROM V$session s, V$lock l
82 WHERE s.Sid = l.Sid) Ls
83 WHERE o.Object_Id = Ls.Id1
84 AND o.Owner <> ’SYS’
85 ORDER BY o.Owner, o.Object_Name
9、查看等待（wait）情况
86 SELECT Ws.CLASS, Ws.COUNT COUNT, SUM(Ss.VALUE) Sum_Value
87 FROM V$waitstat Ws, V$sysstat Ss
88 WHERE Ss.NAME IN (’db block gets’, ’consistent gets’)
89 GROUP BY Ws.CLASS, Ws.COUNT
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