更新时间:2022-08-12 16:08:54
[level] Print/dump a fixed PGA/SGA/UGA variable
DUMPTYPE Print/dump an address with type info
SETVAR
Modify a fixed PGA/SGA/UGA variable
PEEK [level] Print/Dump memory
POKE Modify memory
WAKEUP Wake up Oracle process
SUSPEND Suspend execution
RESUME Resume execution
FLUSH Flush pending writes to trace file
CLOSE_TRACE Close trace file
TRACEFILE_NAME Get name of trace file
LKDEBUG Invoke global enqueue service debugger
NSDBX Invoke CGS name-service debugger
-G Parallel oradebug command prefix
-R Parallel oradebug prefix (return output
SETINST Set instance list in double quotes
SGATOFILE Dump SGA to file; dirname in double quotes
DMPCOWSGA Dump & map SGA as COW; dirname in double quotes
MAPCOWSGA Map SGA as COW; dirname in double quotes
HANGANALYZE [level] [syslevel] Analyze system hang
FFBEGIN Flash Freeze the Instance
FFDEREGISTER FF deregister instance from cluster
FFTERMINST Call exit and terminate instance
FFRESUMEINST Resume the flash frozen instance
FFSTATUS Flash freeze status of instance
SKDSTTPCS Helps translate PCs to names
WATCH Watch a region of memory
DELETE watchpoint Delete a watchpoint
SHOW watchpoints Show watchpoints
CORE Dump core without crashing process
IPC Dump ipc information
UNLIMIT Unlimit the size of the trace file
PROCSTAT Dump process statistics
CALL [arg1] ... [argn] Invoke function with arguments
SQL> oradebug hanganalyze 3;
Hang Analysis in /oracle/admin/orcl/udump/orcl_ora_2622.trc
SQL> exit
Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - 64bit Production
With the Partitioning, OLAP and Data Mining options
-bash-3.2$ more /oracle/admin/orcl/udump/orcl_ora_2622.trc
/oracle/admin/orcl/udump/orcl_ora_2622.trc
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - 64bit Production
With the Partitioning, OLAP and Data Mining options
ORACLE_HOME = /oracle/product/10.2.0/db_1
System name: Linux
Node name: truerhel5
Release: 2.6.18-164.el5
Version: #1 SMP Tue Aug 18 15:51:48 EDT 2009
Machine: x86_64
Instance name: orcl
Redo thread mounted by this instance: 1
Oracle process number: 21
Unix process pid: 2622, image:oracle@truerhel5(TNS V1-V3)
*** SERVICE NAME:(SYS$USERS) 2010-08-07 21:11:10.818
*** SESSION ID:(145.36) 2010-08-07 21:11:10.818
*** 2010-08-07 21:11:10.818
==============
HANG ANALYSIS:
==============
Open chains found:
Chain 1 : : --每列的注解:分为cnode sid sess_srno proc_ptr ospid wait_event
--会话148(持锁会话)
-- --会话146(等待锁会话),竞争事件为:row lock contention
Other chains found:
Chain 2 : :
Chain 3 : :
Chain 4 : :
Chain 5 : :
Chain 6 : :
Extra information that will be dumped at higher levels:
[level 4] : 1 node dumps -- [REMOTE_WT] [LEAF] [LEAF_NW]
[level 5] : 5 node dumps -- [SINGLE_NODE] [SINGLE_NODE_NW] [IGN_DMP]
[level 6] : 1 node dumps -- [NLEAF]
[level 10] : 13 node dumps -- [IGN]
State of nodes
([nodenum]/cnode/sid/sess_srno/session/ospid/state/start/finish/[adjlist]/predecessor):
[143]/0/144/108/0x70f5dcf8/2614/SINGLE_NODE/1/2//none
[144]/0/145/36/0x70f5f130/2622/SINGLE_NODE_NW/3/4//none
[145]/0/146/84/0x70f60568/2607/NLEAF/5/8/[147]/none
[147]/0/148/27/0x70f62dd8/2543/LEAF/6/7//145
[149]/0/150/2/0x70f65648/2338/SINGLE_NODE/9/10//none
[150]/0/151/1/0x70f66a80/2319/SINGLE_NODE/11/12//none
[154]/0/155/1/0x70f6bb60/2315/IGN/13/14//none
[155]/0/156/1/0x70f6cf98/2313/IGN/15/16//none
[157]/0/158/7/0x70f6f808/2336/SINGLE_NODE/17/18//none
[159]/0/160/1/0x70f72078/2305/IGN/19/20//none
[160]/0/161/1/0x70f734b0/2303/IGN/21/22//none
[161]/0/162/1/0x70f748e8/2301/IGN/23/24//none
[162]/0/163/1/0x70f75d20/2299/IGN/25/26//none
[163]/0/164/1/0x70f77158/2297/IGN/27/28//none
[164]/0/165/1/0x70f78590/2295/IGN/29/30//none
[165]/0/166/1/0x70f799c8/2293/IGN/31/32//none
[166]/0/167/1/0x70f7ae00/2291/IGN/33/34//none
[167]/0/168/1/0x70f7c238/2289/IGN/35/36//none
[168]/0/169/1/0x70f7d670/2287/IGN/37/38//none
[169]/0/170/1/0x70f7eaa8/2285/IGN/39/40//none
====================
END OF HANG ANALYSIS
====================
其内容意思大概如下
cnode--节点代号,如果为rac,其值就存在,单节点的值为0
sid---session的sid
sess_srno---session的serial#
proc_ptr--系统进程指向的address
ospid ----进程号
wait_event---session的等待事件
转摘白大师部分节选
Hanganalyze是从Oracle 8i r2(8.1.6)开始提供的,其用法十分简单:
ALTER SESSION SET EVENTS 'immediate trace name HANGANALYZE level ';
或者
ORADEBUG hanganalyze
比如:
sql>oradebug setmypid;
sql>oradebug hanganalyze 3;
对于:
10 Dump all processes (IGN state)
5 Level 4 + Dump all processes involved in wait chains (NLEAF state)
4 Level 3 + Dump leaf nodes (blockers) in wait chains (LEAF,LEAF_NW,IGN_DMP state)
3 Level 2 + Dump only processes thought to be in a hang (IN_HANG state)
1-2 Only HANGANALYZE output, no process dump at all
-bash-3.2$ sqlplus -prelim '/as sysdba' --通过prelim选项进入已经hang住(正常方式进不了sqlplus)的数据库
SQL*Plus: Release 10.2.0.1.0 - Production on Sat Aug 7 21:17:42 2010
Copyright (c) 1982, 2005, Oracle. All rights reserved.
SQL> show parameter sga
ORA-01012: not logged on
SQL> conn /as sysdba
Prelim connection established
SQL>