Instance crash?

Imagine these circumstances:
1. I make an update to one/multiple rows of a table, but do not commit
2. My instance crashes.
How does Oracle manage this? Please correct me if i am wrong
Below is what i have understood
1. SMON does the instance Recovery (Rolling Forward only) for below cases
     a)Uncommited transaction will be recovered if only dirty buffer is written to the datafile even not committed [ alter system checkpoint ]
     b)Uncommited transaction will be recovered if only Redo is generated or log switches occur, or the logs are archived [alter system switch
       logfile/alter system archive log current]
2. Uncommited transaction will be not be recovered if all above of these doesn't happen.Then SMON will do [ Rolling Forward + Rolling Backward ]

913410 wrote:
Imagine these circumstances:
1. I make an update to one/multiple rows of a table, but do not commit
2. My instance crashes.
How does Oracle manage this? Please correct me if i am wrong
Below is what i have understood
1. SMON does the instance Recovery (Rolling Forward only) for below cases
     a)Uncommited transaction will be recovered if only dirty buffer is written to the datafile even not committed [ alter system checkpoint ]
     b)Uncommited transaction will be recovered if only Redo is generated or log switches occur, or the logs are archived [alter system switch
       logfile/alter system archive log current]
2. Uncommited transaction will be not be recovered if all above of these doesn't happen.Then SMON will do [ Rolling Forward + Rolling Backward ]
This is quite well explained here,
http://docs.oracle.com/cd/E11882_01/server.112/e25789/startup.htm#CNCPT1301
Aman....

Similar Messages

Why my instance crashed down

HI,everybody,My instance crashed down last day.
Is there anybody can tell me why ?
oracle version：10.2.0.1.0 (Only Patch 4612267）
OS version：redhat as 4.5
Sorry, I am in china,so there is some chinese character in the alter file,but I think everybody can guess the meanings depending on the location.
alter file：Thu Apr 8 17:02:38 2010
Hex dump of (file 3, block 85680) in trace file /u01/app/oracle/admin/WENDING/bdump/wending_dbw0_22490.trc
Corrupt block relative dba: 0x00c14eb0 (file 3, block 85680)
Bad header found during preparing block for write
Data in bad block:
type: 6 format: 2 rdba: 0x00c14eb0
last change scn: 0x0001.e55fdf1f seq: 0x1 flg: 0x02
spare1: 0x0 spare2: 0x0 spare3: 0x2000
consistency value in tail: 0xdf1f0601
check value in block header: 0xcf0
block checksum disabled
Thu Apr 8 17:02:49 2010
Errors in file /u01/app/oracle/admin/WENDING/bdump/wending_dbw0_22490.trc:
ORA-00600: 内部错误代码, 参数: [kcbzpbuf_1], [4], [1], [], [], [], [], []
Thu Apr 8 17:02:51 2010
Errors in file /u01/app/oracle/admin/WENDING/bdump/wending_dbw0_22490.trc:
ORA-00600: 内部错误代码, 参数: [kcbzpbuf_1], [4], [1], [], [], [], [], []
Thu Apr 8 17:02:51 2010
DBW0: terminating instance due to error 471
Termination issued to instance processes. Waiting for the processes to exit
Thu Apr 8 17:03:02 2010
Instance termination failed to kill one or more processes
Instance terminated by DBW0, pid = 22490
trace file：
BH (0x85fa400c) file#: 3 rdba: 0x00c14eb0 (3/85680) class: 1 ba: 0x85000000
set: 3 blksize: 8192 bsi: 0 set-flg: 0 pwbcnt: 0
dbwrid: 0 obj: 147678 objn: 147678 tsn: 2 afn: 3
hash: [63ff817c,9d1f6d1c] lru-req: [9d465708,9d465708]
lru-flags: on_auxiliary_list object_write_list
ckptq: [26fdb504,30ff0114] fileq: [26fdb50c,6bfbf4cc] objq: [93e35c90,93e35c90]
st: XCURRENT md: NULL tch: 2
flags: buffer_dirty being_written gotten_in_current_mode being_evicted
block_written_once redo_since_read
LRBA: [0x516a.1a2bd.0] HSCN: [0x1.e55fdf1f] HSUB: [1]
Dump of buffer cache at level 10 for tsn=2, rdba=12668592
BH (0x85fa400c) file#: 3 rdba: 0x00c14eb0 (3/85680) class: 1 ba: 0x85000000
set: 3 blksize: 8192 bsi: 0 set-flg: 0 pwbcnt: 0
dbwrid: 0 obj: 147678 objn: 147678 tsn: 2 afn: 3
hash: [63ff817c,9d1f6d1c] lru-req: [9d465708,9d465708]
lru-flags: on_auxiliary_list object_write_list
ckptq: [26fdb504,30ff0114] fileq: [26fdb50c,6bfbf4cc] objq: [93e35c90,93e35c90]
st: XCURRENT md: NULL tch: 2
flags: buffer_dirty being_written gotten_in_current_mode being_evicted
block_written_once redo_since_read
LRBA: [0x516a.1a2bd.0] HSCN: [0x1.e55fdf1f] HSUB: [1]
buffer tsn: 2 rdba: 0x00c14eb0 (3/85680)
scn: 0x0001.e55fdf1f seq: 0x01 flg: 0x02 tail: 0xdf1f0601
frmt: 0x02 chkval: 0x0cf0 type: 0x06=trans data
Hex dump of corrupt header 4 = CORRUPT
Edited by: seven qi on 2010-4-9 上午1:30

thank you for so quick response.
I don't understand what happened when the error appeared.
The trace file is so difficult to read, I don't know what it want to show.
Would you like to tell me what happened with simple language?
Edited by: seven qi on 2010-4-9 上午1:42

Rac Instance Crashes

Dear all,
My version is 11.2.0.2.5 one of my rac instance crashes with message ORA-00240: control file enqueue held for more than 120 seconds. Received an instance abort message from instance 1.
here are the contents of alert log file
IPC Send timeout detected. Receiver ospid 27423 [[email protected] (LMON)]
2013-03-22 22:30:05.644000 -07:00
Errors in file /u01/app/oracle/diag/rdbms/lfgoimdb/LFGoimdb2/trace/LFGoimdb2_lmon_27423.trc:
2013-03-22 22:31:08.734000 -07:00
Errors in file /u01/app/oracle/diag/rdbms/lfgoimdb/LFGoimdb2/trace/LFGoimdb2_arc2_27691.trc (incident=15905):
ORA-00240: control file enqueue held for more than 120 seconds
Incident details in: /u01/app/oracle/diag/rdbms/lfgoimdb/LFGoimdb2/incident/incdir_15905/LFGoimdb2_arc2_27691_i15905.trc
2013-03-22 22:31:13.409000 -07:00
Received an instance abort message from instance 1
Please check instance 1 alert and LMON trace files for detail.
LMS0 (ospid: 27427): terminating the instance due to error 481
System state dump requested by (instance=2, osid=27427 (LMS0)), summary=[abnormal instance termination].
System State dumped to trace file /u01/app/oracle/diag/rdbms/lfgoimdb/LFGoimdb2/trace/LFGoimdb2_diag_27413.trc
2013-03-22 22:31:18.376000 -07:00
Dumping diagnostic data in directory=[cdmp_20130322223113], requested by (instance=2, osid=27427 (LMS0)), summary=[abnormal instance termination].
ORA-1092 : opitsk aborting process
Instance terminated by LMS0, pid = 27427

Thanks for reply,
My redo logs size is default 50mb.There is currently no load on the system since we are not using this environment for time being.The log switches are averaged to be 8 per day.I think Increasing the size of redo will further cause the problems since the archiver may again hold lock for more time.
Since there is no dedicated connection between the nodes and storage ,So increasing the hardware and network configuration is only solution to this? Or I am still missing something...
As far as configuration is considered i cannot add more resources to this environment.How can I solve this issue?

OC4J_SOA INSTANCE CRASH INADVERTENTLY WHILE A ESB SYSTEM IS PROCESSING

We are using OAS 10.1.3.3.0....
We have a ESB system which reads changes in a table (DB Adapter) and enqueue that changes in an AQ queue with an ADT (AQ Adapter)...
Sometimes that ESB process thousands of records very well but sometimes when is processing the oc4j_soa instances
crash and its log show...
07/11/08 17:03:57 at java.lang.Thread.run(Thread.java:595)
# An unexpected error has been detected by HotSpot Virtual Machine:
# SIGSEGV (0xb) at pc=0xb7a0010c, pid=28819, tid=831085488
# Java VM: Java HotSpot(TM) Server VM (1.5.0_06-b05 mixed mode)
# Problematic frame:
# V [libjvm.so+0x3d910c]
# An error report file with more information is saved as hs_err_pid28819.log
# If you would like to submit a bug report, please visit:
# http://java.sun.com/webapps/bugreport/crash.jsp
When I see the AppServer Control the instance is automatically restarted....
I need your help......!
Message was edited by:
user604794

Thanks for your answer....
About it.. let me talk to you the following... I have experienced this crash in Windows XP in a development enviroment, and I think that in an enviroment more robust like Linux this problem woulbe be solved... but no... the same error with less frecuency but the same error...
About Metalink... they told me....
"...You should be able to log a bug with SUN. The JVM is a SUN product. From the error is looks like an issue with one
of the JVM libraries. Once you submit the hs_err_pid28819.log file, SUN should b
e able to search and find a match in there library regarding the issue...."
But In SUN when I try to register the crash I read the following...
" ...If the crash occurred while running a product developed by a company other than Sun, please report this issue to the vendor of that product. ..."
So I don´t know what to do... Anybody HELP....

OC4J Instance crashes on Linux

We have a standalone OC4J instance version 10.1.3.2 on Linux that we use to provide pdf print service for applications developed using APEX. Java version is 1.4.2. I have deployed the fop ear file to the instance, this is delivered with APEX. On several occasions, end users have reported that they can not open the pdf report. When I check the server, the OC4J instance is not running. There is nothing in the java logs or OC4J instance logs to indicate why the instance crashed. When I restart the OC4J instance, printing once again works. Has anyone else had stability problems with this product?
Thanks,
Don Morse

Standalone OC4J runs quite stable on every platform.
You should check the log files or the standard output (where you started OC4J). Also check the memory settings for the JDK. A common problem is that the JDK throws an OutOfMemoryException and won't respond anymore. You should also consider using JDK 1.5.0_x since it has a better memory management.
If this doesn't help post the complete command line.
--olaf

Oracle instance crashed with error 472

My Oracle instance crashed after running for 2 days
with 5 reads and 2 updates in every 4 seconds. The
alert log are
Fri Oct 24 02:59:13 2003
found dead multi-threaded server 's000',pid=(10,1)
Fri Oct 24 03:00:31 2003
LGWR: terminating instance due to error 472
Instance terminated by LGWR, pid = 109
The client access the data through stored procedures.
The database is running on Windows NT 4.0 service pack 6a.
The Oracle is v8.1.5.0.0
Any help will be greatly appreciated.

ORA-00472 PMON process terminated with error
Cause: The Process Monitor process terminated abnormally.
Action: Check the accompanying messages, and the background process trace file. Correct the problem mentioned in the messages. Then shut down and restart the instance. If the trace file mentions any other background process messages, check the trace file for the mentioned process until the root message is found.
Follow the recomendations above
Joel P�rez

Database instance crashes when running expdp

Hi,
I have oracle 10.2.0.4 running on AIX.
when i try to run expdp as below...
expdp system/pwd directory=DATA_PUMP_DIR2 tables=TOAD_PLAN_TABLE dumpfile=test.dmp
i get an error as..
UDE-00008: operation generated ORACLE error 22303
OCI-22303: type "SYS"."KU$_STATUS1020" not found
and the database instance crashes.
I tried increasing the shared_memory_pool, checking the read, write permissions on the directory. but every single time i run the expdp, the instance crashes.
But when i try to run the exp for the same table, it runs fine.
Can someone help me resolve this so i can use the expdp feature.
Thanks.
Philip.

I could not find anything proper w.r.t the datapump failure.
is there a package or something i need to install in the database for the expdp to work.
or do i have to install any libraries for the datapump to work.
Thanks.

Oracle instance crashed

Oracle-Version: 9i R2 9.2.0.1.0.
Hello !
My oracle instance crashed and I found the following message in the log file :
LGWR: terminating instance due to error 472
Instance terminated by LGWR, pid = 1304
I have not found any other messages and the ORA-00472 message says that the PMON process terminated with error.
Did anybody have the same error ?
I need to know why the instance crashed.
I hope you can help me. Thanks in advance.
Andreas

The 472 is just the error issued when the Oracle background processes are signaled to terminate. It would appear log writer took an error and either notified the other background processes to terminate or it terminated and another backgroun process detected the problem, probably smon, and killed the rest of the system processes.
Look in the bdump directory for the log writer trace file and see what it says. There may also be some entries in the alert log depending on exactly what happened.
If the database fired back up without problem and the problem does not reoccur frequently then if might just be one of those things. However, if you can find the trace file and error messages for the problem cause then you should probably open an iTAR with Oracle support to find out he fix/work around.
HTH -- Mark D Powell --

Instance crashing with ORA-00469: CKPT process terminated with error

Hi,
Instance crashing with ORA-00469: CKPT process terminated with error on 10.2.0.4. Any possibe causes?
Thanks,
Madhav

I did check alert log and trace files. I just find this in alert log:
ORA-00469: CKPT process terminated with error
Trace file:
*** 2009-07-29 02:22:06.840
*** SERVICE NAME:(SYS$BACKGROUND) 2009-07-29 02:22:06.839
*** SESSION ID:(275.1) 2009-07-29 02:22:06.839
error 469 detected in background process
ORA-00469: CKPT process terminated with error

OC4J instance crashing after Ping Failed: default_group~home~default_group~

Hi All,
I have noticed from opmn logs that [pm-process] Process Crashes and System has been restarted automatically by itself.
I have read the tread with title "OC4J instance crashing - can't find any diagnostics " and I have configured the opmn.xml file in order to enable opmn.dbg logs.
In the meantime I have suspected that the BPEL crashes are the same date with default_group~home~default_group logs rotation.
[oracle@csporacle1 logs] cat /etc/redhat-release
Red Hat Enterprise Linux ES release 4 (Nahant Update 5)
[oracle@csporacle1 logs] cat opmn.log | grep "Restarting"
10/05/06 17:10:18 [pm-process] Process Crashed: default_group~home~default_group~1 (481247799:27664) - Restarting
10/07/08 03:38:12 [pm-process] Process Crashed: default_group~home~default_group~1 (481247801:12964) - Restarting
10/08/05 15:01:08 [pm-process] Process Crashed: default_group~home~default_group~1 (481247802:22304) - Restarting
10/09/10 04:19:56 [pm-process] Process Crashed: default_group~home~default_group~1 (481247803:5081) - Restarting
10/10/15 00:04:21 [pm-process] Process Crashed: default_group~home~default_group~1 (481247804:7275) - Restarting
10/11/20 14:56:29 [pm-process] Process Crashed: default_group~home~default_group~1 (481247806:28469) - Restarting
10/12/25 11:15:39 [pm-process] Process Crashed: default_group~home~default_group~1 (481247807:17717) - Restarting
11/02/02 22:09:16 [pm-process] Process Crashed: default_group~home~default_group~1 (481247808:540) - Restarting
11/02/26 12:14:55 [pm-process] Process Crashed: default_group~home~default_group~1 (481247809:26490) - Restarting
11/03/12 04:28:19 [pm-process] Process Crashed: default_group~home~default_group~1 (481247812:7348) - Restarting
11/04/25 05:43:59 [pm-process] Process Crashed: default_group~home~default_group~1 (481247817:9090) - Restarting
11/05/21 08:27:55 [pm-process] Process Crashed: default_group~home~default_group~1 (481247818:26304) - Restarting
11/06/18 08:04:03 [pm-process] Process Crashed: default_group~home~default_group~1 (481247826:28958) - Restarting
11/07/12 19:04:46 [pm-process] Process Crashed: default_group~home~default_group~1 (481247828:10867) - Restarting
11/08/21 14:33:08 [pm-process] Process Crashed: default_group~home~default_group~1 (481247832:13556) - Restarting
11/09/18 20:40:16 [pm-process] Process Crashed: default_group~home~default_group~1 (481247835:22024) - Restarting
11/10/17 13:56:47 [pm-process] Process Crashed: default_group~home~default_group~1 (481247838:20504) - Restarting
[oracle@csporacle1 logs] ls -lrt
total 6020344
-rw-r--r-- 1 oracle dba          0 Feb 17 2010 opmn.out
-rw-r--r-- 1 oracle dba   84895911 Feb 2 2011 default_group~home~default_group~1.log.11-02-02_22:09:16.gz
-rw-r--r-- 1 oracle dba   83151884 Feb 26 2011 default_group~home~default_group~1.log.11-02-26_12:14:55.gz
-rw-r--r-- 1 oracle dba   79803990 Mar 12 2011 default_group~home~default_group~1.log.11-03-12_04:28:19.gz
-rw-r--r-- 1 oracle dba   66470738 Mar 29 2011 default_group~home~default_group~1.log.11-03-29_00:17:05.gz
-rw-r--r-- 1 oracle dba   84542865 Apr 25 2011 default_group~home~default_group~1.log.11-04-25_05:43:59.gz
-rw-r--r-- 1 oracle dba   83672948 May 21 08:27 default_group~home~default_group~1.log.11-05-21_08:27:55.gz
-rw-r--r-- 1 oracle dba   84825282 Jun 18 08:04 default_group~home~default_group~1.log.11-06-18_08:04:03.gz
-rw-r--r-- 1 oracle dba   86740423 Jul 12 19:04 default_group~home~default_group~1.log.11-07-12_19:04:46.gz
-rw-r--r-- 1 oracle dba   66921060 Aug 3 23:06 default_group~home~default_group~1.log.11-08-04_02:28:06.gz
-rw-r--r-- 1 oracle dba   71221025 Aug 21 14:33 default_group~home~default_group~1.log.11-08-21_14:33:08.gz
-rw-r--r-- 1 oracle dba 2147483647 Sep 18 20:39 default_group~home~default_group~1.log.11-09-18_20:40:16
-rw-r--r-- 1 oracle dba 2147483647 Oct 17 13:56 default_group~home~default_group~1.log.11-10-17_13:56:49
drwxr-x--- 2 oracle dba       4096 Oct 24 00:11 states
-rw-r--r-- 1 oracle dba      64203 Oct 24 20:09 opmn.log
-rw-r--r-- 1 oracle dba 976001440 Oct 28 02:35 default_group~home~default_group~1.log
-rw-r--r-- 1 oracle dba   95431960 Oct 28 02:36 opmn.dbg
[oracle@csporacle1 logs] After this I have check the opmn.xml and found that the ORACLE_HOME has been set to other oracle on the same Unit.
oracle@csporacle1 opmn] cat conf/opmn.xml | head -20
<?xml version = '1.0' encoding = 'UTF-8'?>
<opmn xmlns="http://www.oracle.com/ias-instance">
   <log path="$ORACLE_HOME/opmn/logs/opmn.log" comp="internal;ons;pm" rotation-size="1500000"/>
   <debug path="$ORACLE_HOME/opmn/logs/opmn.dbg" comp="internal;pm;ons" rotation-size="1500000"/>
   <notification-server interface="ipv4">
      <port local="6100" remote="6200" request="6003"/>
      <ssl enabled="true" wallet-file="$ORACLE_HOME/opmn/conf/ssl.wlt/default"/>
   </notification-server>
   <process-manager>
      <process-modules>
         <module path="$ORACLE_HOME/opmn/lib/libopmnohs">
            <module-id id="OHS"/>
         </module>
         <module path="$ORACLE_HOME/opmn/lib/libopmnoc4j">
            <module-id id="OC4J"/>
         </module>
         <module path="$ORACLE_HOME/opmn/lib/libopmncustom">
            <module-id id="CUSTOM"/>
         </module>
         <module path="$ORACLE_HOME/opmn/lib/libopmniaspt">
[oracle@csporacle1 opmn] pwd
/space/u01/app/oracle/product/10.1.3.1/OracleAS_1/opmn
[oracle@csporacle1 opmn] cd $ORACLE_HOME
[oracle@csporacle1 10.1] pwd
/u01/app/oracle/product/10.1
[oracle@csporacle1 10.1] Are these error are related with my findings or are there any criteria must i check further.
Could you please help me to solve this problem.
Thanks & Best Regards,
Bahtiyar

gday mattysmith --
Unfortunately that's a very good question.
As OPMN is in the picture here, the first step may be to enable debug logging for OPMN in the chance that it may give you more information about why it thinks the process crashed.
Generally speaking, when OPMN is restarting a process, it can be because it recognized that a managed process has dissapeared (ie JVM core dumped, etc.) or it can also be because the JVM didn't respond to any of OPMNs requests to let it know it was still alive. In which case OPMN will kill then restart the managed process. This can be caused by situations where the JVM has run out of memory, etc. and becomes unresponsive, leading to it eventually being detected as such and restarted.
What you can do is to add the OPMN PM submodule to the OPMN debug logger.
<opmn xmlns="http://www.oracle.com/ias-instance">
<log path="$ORACLE_HOME\opmn\logs\opmn.log" comp="internal;ons;pm" rotation-s
ize="1500000"/>
<debug path="$ORACLE_HOME\opmn\logs\opmn.dbg" comp="internal;pm;ons" rotation-size="1500000"/>
</opmn>
That should then produce an opmn.dbg file in the $ORACLE_HOME/opmn/logs directory. It'll be very verbose, so you'll need to associate the restart times from the other log file to locate the relevant section of the file. Hopefully that may shed some light on what is happening, at least at the restart level.
Usually if there are runtime exceptions such as OOM errors, etc. then those are dumped to stderr/stdout. Check the contents of the other log files in the opmn/logs directory of the form default_group~home~default_group~1.log to see if there is anything obvious in there.
There has been reports of an issue with PermGen space usage -- that could be something you are running into under the covers. Try resizing the permgen space to be a little larger and see if the problem goes away -- that can be done in opmn.xml in the java > start-options section of the instance in question.
See how any of that goes!
-steve-

Instance crash on RAC will impact goldengate extract process?

Dear All,
DB Version: 11.2.0.3
GG version: 11.2.0.1
Could you please let me know, how gg works when a instance crashes in a RAC cluster. Will extract proess get abend or extract will continue to capture
Thank you very much in advance
Regards
Mvk

If GG is configured properly for the RAC, the GG manager should start extract on the living node and there should not be any data loss.
Please refer to Oracle documentation on how to configure GG in RAC.

Instance crash during backup

What should I one do when instance crashes during user-managed hot backup?
Bounce the instance?
Message was edited by:
Pedro Alvarez

What should I one do when instance crashes during user-managed hot backup? well, you can try this...
When u started user managed backup, I assume that you put tablespace in backup mode...
ALTER TABLESPACE tablespace_name BEGIN BACKUP;
Now you use o/s copy commands to copy the associated datafiles.
and if instance crashes during hot backup...then the backup u made till then would be useless.
when u restart the Instance, it wouldn't open the database because the tablespace (all associated datafiles) would be in Backup mode (header SCN frozen; inconsistent with control file)....so all you need is to take the tablespace (associated datafiles) out of backup mode by....
ALTER DATABASE END BACKUP; --all datafiles which were in backup mode will come out of this mode.
or
ALTEAR DATABASE DATAFILE datafile_name END BACKUP; -- to get individual datafile out of backup mode....
(how to check which datafiles are in backup mode???
use a view called V$DATAFILE_HEADER....the value of column FUZZY would be YES for the datafiles in backup mode...)
Now start the instance and open the database
I hope it would work fine...
Cheers
MUKESH

Difference between Instance Crash and Database Crash in Standalone and RAC?

I am new to Oracle Environment. I would appreiciate if i get clarified on the "_+Difference between Instance Crash and Database Crash in Standalone and
RAC_".+
Oracle Version: 11.1.0.7.0
O.S Version: HP-UX B.11.31 U

Sivaprasad S wrote:
I am new to Oracle Environment. I would appreiciate if i get clarified on the "_+Difference between Instance Crash and Database Crash in Standalone and
RAC_".+That depends on your definitions of database crash versus instance crash.
Literally, database crash means that the database itself is damaged in some way. A disk is no more. Data files are corrupted. Etc. The database itself thus causes the crash - and a database crash will also cause all database instances (RAC or single) for that database to crash too.
An instance crash will therefore mean that the crash occurs in the instance due to an Oracle bug or similar. In other words a s/w error and not a database error. The database is still "fine", but the instance not. Instance crashes. However, any other instance on that same (RAC) database will still be fine as the database itself is unaffected by that s/w error in the crashed instance.
If you mean something different, please enlighten us. Not all crashes are equal. {noformat};-){noformat}

Production instance crashed

My production instance crashes and while trying to restart it i get shared memory errors - how do i remedy this?

Can you post the exact error.
Did you set ORACLE_SID & ORACLE_HOME env variables??
Also what version of oracle and OS you are on?
Daljit Singh

Rman instance crash and disappear

I have an rman instance in oracle 9
the instance crash and disappear suddenly.
I need to recover it by restarting the rman instance again.
There is no any information in the log like alert log as I search
before already.No any log information certainly.
How can I set trace or debug for this instance
So , next time ,it crash again ,I can have information to pass to support ??
Any advice

user6820833 wrote:
I have an rman instance in oracle 9
the instance crash and disappear suddenly.
I need to recover it by restarting the rman instance again.
There is no any information in the log like alert log as I search
before already.No any log information certainly.
How can I set trace or debug for this instance
So , next time ,it crash again ,I can have information to pass to support ??
Any adviceWhat does it mean by "rman instance"? I believe you mean that your db got crashed and is terminated. If so, did you check for any process crash or something like that? If there is nothing reported in the alert log, I don't think that its possible that anyone over here would be able to tell why your instance got crashed? I can't think of anything that you can enable on the instance for this in a proactive manner. So just restart and see if it happens again.
HTH
Aman....

Instance crash?

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