oradebugm命令介绍
TRACEFILE_NAME command
显示当前trace文件名
SQL>oradebug tracefile_name
For example
/export/home/admin/SS92003/udump/ss92003_ora_14917.trc
unlimit命令
取消trace文件大小限制
SQL>oradebug unlimit
FLUSH命令
将当前trace buffer中的内容刷新到trace文件
SQL>oradebug flush
CLOSE_TRACE命令
关闭trace文件
SQL>oradebug close_trace
oradebug支持的命令
可以使用sys用户权限运行oradebug help显示所有oradebug的操作。在11.1.0.7 for linux 64bit数据库上的显示如下：
SQL> oradebug help
HELP [command] Describe one or all commands
SETMYPID Debug current process
SETOSPID <ospid> Set OS pid of process to debug
SETORAPID <orapid> ['force'] Set Oracle pid of process to debug
SETORAPNAME <orapname> Set Oracle process name to debug
SHORT_STACK Get abridged OS stack
CURRENT_SQL Get current SQL
DUMP <dump_name> <lvl> [addr] Invoke named dump
DUMPSGA [bytes] Dump fixed SGA
DUMPLIST Print a list of available dumps
EVENT <text> Set trace event in process
SESSION_EVENT <text> Set trace event in session
DUMPVAR <p|s|uga> <name> [level] Print/dump a fixed PGA/SGA/UGA variable
DUMPTYPE <address> <type> <count> Print/dump an address with type info
SETVAR <p|s|uga> <name> <value> Modify a fixed PGA/SGA/UGA variable
PEEK <addr> <len> [level] Print/Dump memory
POKE <addr> <len> <value> Modify memory
WAKEUP <orapid> 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 <Inst-List | def | all> Parallel oradebug command prefix
-R <Inst-List | def | all> Parallel oradebug prefix (return output
SETINST <instance# .. | all> Set instance list in double quotes
SGATOFILE <SGA dump dir> Dump SGA to file; dirname in double quotes
DMPCOWSGA <SGA dump dir> Dump & map SGA as COW; dirname in double quotes
MAPCOWSGA <SGA dump dir> 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 <ifname> <ofname> Helps translate PCs to names
WATCH <address> <len> <self|exist|all|target> Watch a region of memory
DELETE <local|global|target> watchpoint <id> Delete a watchpoint
SHOW <local|global|target> watchpoints Show watchpoints
DIRECT_ACCESS <set/enable/disable command | select query> Fixed table access
CORE Dump core without crashing process
IPC Dump ipc information
UNLIMIT Unlimit the size of the trace file
PROCSTAT Dump process statistics
CALL [-t count] <func> [arg1]...[argn] Invoke function with arguments
oradebug用来诊断系统进程
如果是操作系统的进程ID，可以使用oradebug setospid id.
如果是根据Oracle ID，可以使用oradebug setorapid id 来追踪。
查询进程id
可以查询Linux 操作系统的process id或是oracle自己的pid：
- 查询os process id：
SYS@dave2(db2)> select a.username,a.sid ,a.serial#,b.spid from v$session a,v$process b where a.paddr=b.addr;
USERNAME SID SERIAL# SPID
---------- ---------- ---------- ------------
SYS 159 1702 27028
* 查询oracle spid
SYS@dave2(db2)> select pid,spid,username from v$process;
PID SPID USERNAME
---------- ------------ ----------
18 27028 oracle
开启trace
SYS@dave2(db2)> oradebug setospid 27028 -- 根据系统ID
Oracle pid: 18, Unix process pid: 27028, image: oracledave2@db2
SYS@dave2(db2)> oradebug setorapid 18 --根据Oracle ID
Unix process pid: 27028, image: oracledave2@db2
设定dump相关内容
指定为SID 之后，就可以使用dump 将相关的信息，这些dump 内容很多。 可以使用dumplist 把所有的dump 可列出来。
具体使用，参考：http://psoug.org/reference/oradebug.html
SQL> oradebug dumplist
TRACE_BUFFER_ON
TRACE_BUFFER_OFF
LATCHES
PROCESSSTATE
SYSTEMSTATE
INSTANTIATIONSTATE
REFRESH_OS_STATS
CROSSIC
CONTEXTAREA
HANGDIAG_HEADER
HEAPDUMP
HEAPDUMP_ADDR
POKE_ADDRESS
POKE_LENGTH
POKE_VALUE
POKE_VALUE0
GLOBAL_AREA
REALFREEDUMP
FLUSH_JAVA_POOL
POOL_SIMULATOR
PGA_DETAIL_GET
PGA_DETAIL_DUMP
PGA_DETAIL_CANCEL
MODIFIED_PARAMETERS
EVENT_TSM_TEST
ERRORSTACK
CALLSTACK
TEST_STACK_DUMP
TEST_GET_CALLER
RECORD_CALLSTACK
EXCEPTION_DUMP
BG_MESSAGES
ENQUEUES
KSTDUMPCURPROC
KSTDUMPALLPROCS
KSTDUMPALLPROCS_CLUSTER
SIMULATE_EOV
KSFQP_LIMIT
KSKDUMPTRACE
DBSCHEDULER
LDAP_USER_DUMP
LDAP_KERNEL_DUMP
DUMP_ALL_OBJSTATS
DUMPGLOBALDATA
HANGANALYZE
HANGANALYZE_PROC
HANGANALYZE_GLOBAL
GES_STATE
OCR
CSS
CRS
SYSTEMSTATE_GLOBAL
MMAN_ALLOC_MEMORY
MMAN_CREATE_DEF_REQUEST
MMAN_CREATE_IMM_REQUEST
MMAN_IMM_REQUEST
DUMP_ALL_COMP_GRANULE_ADDRS
DUMP_ALL_COMP_GRANULES
DUMP_ALL_REQS
DUMP_TRANSFER_OPS
DUMP_ADV_SNAPSHOTS
ADJUST_SCN
NEXT_SCN_WRAP
CONTROLF
FLUSH_CACHE
FULL_DUMPS
BUFFERS
RECOVERY
SET_TSN_P1
BUFFER
PIN_BLOCKS
BC_SANITY_CHECK
PIN_RANDOM_BLOCKS
SET_NBLOCKS
CHECK_ROREUSE_SANITY
DUMP_PINNED_BUFFER_HISTORY
KCBO_OBJ_CHECK_DUMP
REDOLOGS
LOGHIST
ARCHIVE_ERROR
REDOHDR
LOGERROR
OPEN_FILES
DATA_ERR_ON
DATA_READ_ERR_ON
DATA_ERR_OFF
BLK0_FMTCHG
UPDATE_BLOCK0_FORMAT
TR_SET_BLOCK
TR_SET_ALL_BLOCKS
TR_SET_SIDE
TR_CRASH_AFTER_WRITE
TR_READ_ONE_SIDE
TR_CORRUPT_ONE_SIDE
TR_RESET_NORMAL
TEST_DB_ROBUSTNESS
LOCKS
GC_ELEMENTS
FILE_HDRS
KRB_CORRUPT_INTERVAL
KRB_CORRUPT_SIZE
KRB_CORRUPT_REPEAT
KRB_CORRUPT_OFFSET
KRB_PIECE_FAIL
KRB_OPTIONS
KRB_FAIL_INPUT_FILENO
KRB_SIMULATE_NODE_AFFINITY
KRB_TRACE
KRB_BSET_DAYS
KRB_SET_TIME_SWITCH
KRB_OVERWRITE_ACTION
KRB_CORRUPT_SPHEADER_INTERVAL
KRB_CORRUPT_SPHEADER_REPEAT
KRB_CORRUPT_SPBITMAP_INTERVAL
KRB_CORRUPT_SPBITMAP_REPEAT
KRB_CORRUPT_SPBAD_INTERVAL
KRB_CORRUPT_SPBAD_REPEAT
KRB_UNUSED_OPTION
KRBMRSR_LIMIT
KRBMROR_LIMIT
KRC_TRACE
KRA_OPTIONS
KRA_TRACE
FBTAIL
FBINC
FBHDR
FLASHBACK_GEN
KTPR_DEBUG
DUMP_TEMP
DROP_SEGMENTS
TEST_SPACEBG
TREEDUMP
LONGF_CREATE
KDLIDMP
ROW_CACHE
LIBRARY_CACHE
CURSORDUMP
CURSORTRACE
CURSOR_STATS
SHARED_SERVER_STATE
LISTENER_REGISTRATION
JAVAINFO
KXFPCLEARSTATS
KXFPDUMPTRACE
KXFPBLATCHTEST
KXFXSLAVESTATE
KXFXCURSORSTATE
WORKAREATAB_DUMP
KUPPLATCHTEST
OBJECT_CACHE
SAVEPOINTS
RULESETDUMP
RULESETDUMP_ADDR
FAILOVER
OLAP_DUMP
SELFTESTASM
ASMDISK_ERR_ON
ASMDISK_READ_ERR_ON
ASMDISK_ERR_OFF
IOERREMUL
IOERREMULRNG
ALRT_TEST
AWR_TEST
AWR_FLUSH_TABLE_ON
AWR_FLUSH_TABLE_OFF
ASHDUMP
MMON_TEST
ATSK_TEST
HM_FW_TRACE
IR_FW_TRACE
KSDTRADV_TEST
获得被监控进程的状态
如果为了获取全面一点的信息，可以使用Level 10
例子如下：
SYS@dave2(db2)> oradebug setospid 27028
Oracle pid: 18, Unix process pid: 27028, image: oracledave2@db2
SYS@dave2(db2)> oradebug unlimit
Statement processed.
SYS@dave2(db2)> oradebug dump systemstate 10
Statement processed.
SYS@dave2(db2)> oradebug TRACEFILE_NAME
/u01/app/oracle/admin/dave2/udump/dave2_ora_27028.trc
SYS@dave2(db2)> oradebug close_trace
Statement processed.
[oracle@db2 ~]$ tail -50 /u01/app/oracle/admin/dave2/udump/dave2_ora_27028.trc
监控oracle进程
把系统进程替换成oracle服务器会话的进程即可。
例子如下:
SQL> oradebug setospid 3260 --进程的spid
SQL> oradebug event 10046 trace name context forever,level 4
-- 取消追踪使用
SQL> oradebug event 10046 trace name context off
已处理的语句
oradebug的其他用途
参考：http://www.juliandyke.com/Diagnostics/Tools/ORADEBUG/Introduction.html
dump命令
To perform a dump use
SQL>oradebug dump dumpname level
For example for a level 4 dump of the library cache use
SQL>oradebug setmypid
SQL>oradebug dump library_cache 4
EVENT command
oradebug可以用来开启event。
For example to set event 10046, level 12 in Oracle process 8 use
SQL>oradebug setorapid 8
SQL>oradebug event 10046 trace name context forever, level 12
SQL>oradebug event 10046 trace name context off
SESSION_EVENT command（当前session）
oradebug可以用来开启oracle session event
SQL>oradebug session_event 10046 trace name context forever, level 12
SQL>oradebug session_event 10046 trace name context off
SESSION_EVENT command（其他session）
- Enable：
SQL>execute dbms_system.set_ev(sid,serial#,event,level, '')
SQL>execute dbms_system.set_ev (9,29,10046,8,'');
- Disable则将level改为0
SQL> execute dbms_system.set_ev (9,29,10046,0,'');
然后可以使用oradebug setospid命令指定进程的号码，进而获取到trace文件名称等信息。
DUMP SGA
To dump the fixed SGA use
SQL>oradebug dumpsga
DUMP VAR
To dump an SGA variable use
SQL>oradebug dumpvar sga variable_name
PEEK
To peek memory locations use
SQL>oradebug peek address length
where address can be decimal or hexadecimal and length is in bytes
例如:
SQL>ORADEBUG PEEK 0x20005F0C 12
returns 12 bytes starting at location 0x20005f0c
POKE
To poke memory locations use
SQL>ORADEBUG POKE address length value
where address and value can be decimal or hexadecimal and length is in bytes
例如：
SQL>ORADEBUG POKE 0x20005F0C 4 0x46495845
SQL>ORADEBUG POKE 0x20005F10 4 0x44205349
SQL>ORADEBUG POKE 0x20005F14 2 0x5A45
WARNING Do not use the POKE command on a production system
IPC
To dump information about operating system shared memory and semaphores configuration use the command：
SQL>ORADEBUG IPC
此命令在windows平台下无法工作。
Dumping the SGA
In some versions it is possible to dump the entire SGA to a file.
Freeze the instance using：
SQL>oradebug ffbegin
Dump the SGA to a file using
SQL>oradebug sgatofile directory
Unfreeze the instance using
SQL>oradebug ffresumeinst
**粗体** _斜体_ [链接](http://example.com) `代码` - 列表 > 引用。你还可以使用@来通知其他用户。