Reg:Redo log files
Hi,
By mistake the redo log files have been removed.
Hence we tried to create the redo log files.
After creating it when select * from v$log is done, it is as follows
SQL> select * from v$log;
GROUP# THREAD# SEQUENCE# BYTES MEMBERS ARC STATUS
FIRST_CHANGE# FIRST_TIM
1 1 0 1073741824 1 YES UNUSED
0
3 1 0 1073741824 1 YES UNUSED
0
2 1 0 1073741824 1 NO CURRENT
179433372 20-NOV-10
Due to this, whatever alter command we use, it is not working.
For ex.
SQL> alter database open resetlogs;
alter database open resetlogs
ERROR at line 1:
ORA-01194: file 1 needs more recovery to be consistent
ORA-01110: data file 1: '/alcatel/oracle/oradata/SNM/system01.dbf'
SQL> alter database mount;
alter database mount
ERROR at line 1:
ORA-01100: database already mounted
SQL> alter system switch logfile;
alter system switch logfile
ERROR at line 1:
ORA-01109: database not open
SQL> ALTER DATABASE OPEN;
ALTER DATABASE OPEN
ERROR at line 1:
ORA-01589: must use RESETLOGS or NORESETLOGS option for database open
WE want to change the status in v$log table from Current to ACTIVE and UNUSED to INACTIVE.
How can we do that?
Can anyone help us?
Regards
Srini
Hi ,
WE have tried those but in vain..
Please find the error logs
SQL> alter system switch logfile;
alter system switch logfile
ERROR at line 1:
ORA-01109: database not open
SQL> alter database open resetlogs;
alter database open resetlogs
ERROR at line 1:
ORA-01194: file 1 needs more recovery to be consistent
ORA-01110: data file 1: '/alcatel/oracle/oradata/SNM/system01.dbf'
SQL> ORA-01194: file 1 needs more recovery to be consistent
ORA-01110: data file 1: '/alcatel/oracle/oradata/SNM/system01.dbf'SP2-0734: unknown command beginning "ORA-01194:..." - rest of line ignored.
SQL> ^C
SQL> recover database until cancel;
ORA-00283: recovery session canceled due to errors
ORA-01610: recovery using the BACKUP CONTROLFILE option must be done
SQL> alter database open resetlogs;
alter database open resetlogs
ERROR at line 1:
ORA-01194: file 1 needs more recovery to be consistent
ORA-01110: data file 1: '/alcatel/oracle/oradata/SNM/system01.dbf'
SQL> recover database until cancel using backup controlfile;
ORA-00279: change 179433372 generated at 11/20/2010 18:00:10 needed for thread
1
ORA-00289: suggestion : /alcatel/oracle/admin/SNM/arch/arch_1_635_666206692.arc
ORA-00280: change 179433372 for thread 1 is in sequence #635
Srini
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251,1 95%>I am try to create a new database using DBCA
>Please help me to resolve this issue.My redo log file was missing
DROP and recreate the database. It is a *new* database without any data.
Check what datafile locations and redo log file locations you specify when creating the new database. Check if you have permissions and enough disk space.
Hemant K Chitale -
Hi Experts,
I want to remove a wrong redo log file from 10G R2 database in window.
how to do that without loss data?
my steps as
1. alter system switch logfile;
2. select * from v$log;
which ARC and sataus do I can drop redo log file based on above SQL
no archive and active status?
ALso Which account should I do above action?
fExamp, system account added redo log file, i only
can drop by system? how about sys?
Thanks help in detail steps
Jim
Edited by: user589812 on Dec 23, 2008 4:35 PMJim,
Check this link out for how to drop a redo log file
Make sure a redo log group is archived (if archiving is enabled) before dropping it. To see whether this has happened, use the V$LOG view.
http://download.oracle.com/docs/cd/B19306_01/server.102/b14231/onlineredo.htm#i1006489
SELECT GROUP#, ARCHIVED, STATUS FROM V$LOG;
GROUP# ARC STATUS
1 YES ACTIVE
2 NO CURRENT
3 YES INACTIVE
4 YES INACTIVE
Drop a redo log group with the SQL statement ALTER DATABASE with the DROP LOGFILE clause.
The following statement drops redo log group number 3:
ALTER DATABASE DROP LOGFILE GROUP 3; -
What is a redo log file? can anyone explain in simple terms
I am confused between redo log file and physical datafile can anyone explain in simple terms
Thank u
Regards,
VijaySee Overview of Physical Database Structures
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Restore in noarchivelog mode ( redo log files have been dropped )
1, A full backup taken using RMAN is available on disk.
2, The current control files were NOT damaged and do not need to be restored.
3, All data files are damaged .
4, The database is in NOARCHIVELOG mode.
I restore database :
1. RMAN> STARTUP MOUNT
2. RMAN> RESTORE DATABASE;
3. RMAN> recover database;
in this step , I got the information about needing redo log files ; but the redo log
files have been dropped , what should i do ?
else
I want to know there is the command 'recover database using backup control file'
in rman or not ?
TksPossibly loss of data (because information in online redo logs is lost):
recover database until cancel;
(cancel immediately)
alter database open resetlogs; (to build a new set of redo logs)
It's not necessary to use a backup controlfile here. -
How to recover from one corrupted redo log file in NOARCHIVE mode?
Oracle 10.2.1.
The redo log file was corrupted and Oracle can't work.
When I use STARTUP mount, I got no error msg.
SQL> startup mount
ORACLE instance started.
Total System Global Area 1652555776 bytes
Fixed Size 1251680 bytes
Variable Size 301991584 bytes
Database Buffers 1342177280 bytes
Redo Buffers 7135232 bytes
Database mounted.
But I have some applications which are depended on Oracle can't be started.
So, I tried STARTUP open. But I got error msg.
SQL> startup open
ORACLE instance started.
Total System Global Area 1652555776 bytes
Fixed Size 1251680 bytes
Variable Size 301991584 bytes
Database Buffers 1342177280 bytes
Redo Buffers 7135232 bytes
Database mounted.
ORA-00368: checksum error in redo log block
ORA-00353: log corruption near block 497019 change 42069302 time 11/07/2007
23:43:09
ORA-00312: online log 4 thread 1:
'G:\ORACLE\PRODUCT\10.2.0\ORADATA\NMDATA\REDO04.LOG'
So, how can I restore and recover my database?
If use RMAN, how to do that?
Any help will be appreciated.
Thanks.Hi, Yingkuan,
Thanks for the helps.
Actually, I have 10 redo log files exists. All of them are here.
I tried your suggestion:
alter database clear unarchived logfile group 4;
The error msg I got is the same as before:
SQL> alter database clear unarchived logfile group 4;
alter database clear unarchived logfile group 4
ERROR at line 1:
ORA-01624: log 4 needed for crash recovery of instance nmdata (thread 1)
ORA-00312: online log 4 thread 1:
'G:\ORACLE\PRODUCT\10.2.0\ORADATA\NMDATA\REDO04.LOG'
Compared to losing all the data, it is OK for me lose some of them.
I have more than 1 TB data stored and 99.9% of them are raster images.
The loading of these data were the headache. If I can save them, I can bear the lost.
I want to grasp the last straw.
But I don't know how set the parameter: allowresetlogs_corruption
I got the error msg:
SQL> set allowresetlogs_corruption=true;
SP2-0735: unknown SET option beginning "_allow_res..."
I have run the command:
Recover database until cancel
Alter database open resetlogs
The error msg I got is the following:
SQL> recover database until cancel
ORA-00279: change 41902930 generated at 11/05/2007 22:01:48 needed for thread 1
ORA-00289: suggestion :
D:\ORACLE\PRODUCT\10.2.0\FLASH_RECOVERY_AREA\NMDATA\ARCHIVELOG\2007_11_09\O1_MF_
1_1274_%U_.ARC
ORA-00280: change 41902930 for thread 1 is in sequence #1274
Specify log: {<RET>=suggested | filename | AUTO | CANCEL}
cancel
ORA-01547: warning: RECOVER succeeded but OPEN RESETLOGS would get error below
ORA-01194: file 1 needs more recovery to be consistent
ORA-01110: data file 1: 'D:\ORACLE\PRODUCT\10.2.0\ORADATA\NMDATA\SYSTEM01.DBF'
ORA-01112: media recovery not started
SQL>
From the log file, I got the following:
ALTER DATABASE RECOVER database until cancel
Fri Nov 09 00:12:48 2007
Media Recovery Start
parallel recovery started with 2 processes
ORA-279 signalled during: ALTER DATABASE RECOVER database until cancel ...
Fri Nov 09 00:13:20 2007
ALTER DATABASE RECOVER CANCEL
Fri Nov 09 00:13:21 2007
ORA-1547 signalled during: ALTER DATABASE RECOVER CANCEL ...
Fri Nov 09 00:13:21 2007
ALTER DATABASE RECOVER CANCEL
ORA-1112 signalled during: ALTER DATABASE RECOVER CANCEL ...
Thank you very much. and I am looking forward to your followup input. -
Hoping for a quick response : EXP and Archived REDO log files
I apologize in advance if this question has been asked and answered 100 times. I admit I didn't search, I don't have time. I'm leaving on vacation tomorrow, and I need to know if I'm correct about something to do with backup / restore.
we have 10g R2 running a single instance on a single server. The application vendor has "embedded" oracle with their application. The vendor's backup is a batch file using EXP - thus:
exp system/xpwdxx@db full=y file=D:\Orant\admin\db\EXP\db_full.dmp log=D:\Orant\admin\db\EXP\db_full.txt direct=y compress=y
This command is executed nightly at midnight. The files are then backed up by our nightly backup to offsite storage media.
Te database is running in autoarchive mode. The problem is, the archived redo files filled the drive they were being stored on, and it is the drive the database is on. I used OS commands to move 136G of archived redo logs onto other storage media to free the drive.
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Hoping for a quick response
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Bruce DavisBruce Davis wrote:
Amardeep Sidhu
Thank you for your quick reply. I am reading in the other responses that since I am using EXP without consistent=y, I might not even have a backup. The application vendor said that with this dmp file they can restore us to the most recent backup. I don't really care for this strategy as it is untested. I asked them to verify that they could restore us and they said they tested the dmp file and it was OK.
Thank you for taking the time to reply.
Best Regards
BruceThe dump file is probably ok in the sense it is not corrupted and can be used in an imp operation. That doesn't mean the data in it is transactionally consistent. And to use it at all, you have to have a database up and running. If the database is physically corrupted, you'll have to rebuild a new database from scratch before you can even think about using your dmp file.
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Errors reported in alert log file regarding redo log files
Hi,
In my database i see the following entries regarding the redo log files frequently.
Thread 1 advanced to log sequence 88
Current log# 3 seq# 88 mem# 0: D:\ORACLE\PRODUCT\10.2.0\ORADATA\PELICAN\REDO03.LOG
Thread 1 advanced to log sequence 89
Current log# 1 seq# 89 mem# 0: D:\ORACLE\PRODUCT\10.2.0\ORADATA\PELICAN\REDO01.LOG
Thread 1 cannot allocate new log, sequence 90
Checkpoint not complete
I have 3 redo log files of 50MB each. My database is 10g.
What is the reason?
What do i need to do ?
Thanks.Hi,
It is clearly stated that checkpoint is not complete. Thats why it could not allocate new sequence number to group 1.
We can understand that your redo log group size is insufficient. or increase the number of redo log groups.
Just test adding one more redo log group or test by increasing the size of redo log groups. -
How to increase the size of Redo log files?
Hi All,
I have 10g R2 RAC on RHEL. As of now, i have 3 redo log files of 50MB size. i have used redo log size advisor by setting fast_start_mttr_target=1800 to check the optimal size of the redologs, it is showing 400MB. Now, i want to increase the size of redo log files. how to increase it?
If we are supposed to do it on production, how to do?
I found the following in one of the article....
"The size of the redo log files can influence performance, because the behavior of the database writer and archiver processes depend on the redo log sizes. Generally, larger redo log files provide better performance, however it must balanced out with the expected recovery time.Undersized log files increase checkpoint activity and increase CPU usage."
I did not understand the the point however it must balanced out with the expected recovery time in the above given paragraph.
Can anybody help me?
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Praveen.You dont have to shutdown the database before dropping redo log group but make sure you have atleast two other redo log groups. Also note that you cannot drop active redo log group.
Here is nice link,
http://www.idevelopment.info/data/Oracle/DBA_tips/Database_Administration/DBA_34.shtml
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Moving the online redo log files to different location
We just installed few more drives into our sandbox system and I want to move the online redo log files for better performance. We've got the SAPARCH directory moved to a different location.
Does anyone know how/where I can change the parameters so redo log files are pointed at different drives? It's not in the <b>init<SID>.ora</b> file...
Regards,
SumitHi Sumit,
The following link contains information about moving the redo logs:
http://www.stanford.edu/dept/itss/docs/oracle/9i/server.920/a96521/onlineredo.htm
Best regards,
Alwin -
Online redo log files being removed physically
Grid Infra version: 11.2.0.4
RDBMS Version: 11.2.0.4
Although this is a RAC DB, this is not a RAC-specific question. Hence posting it here.
Few months back, I remember issuing a command similair to below (DROP LOGFILE GROUP ...) and the redo log files were still physically present in the diskgroup.
If I remember correctly, the file is not deleted physical so that we can use the REUSE functionality (ALTER DATABASE ADD LOGFILE MEMBER '+REDO/orcl/onlinelog/redo1b.log' reuse to group 11; ) ie. you can use the REUSE command to add the logfile of the same name which is physically present in OS Filesystem/Diksgroup to redo log group.
But today, after I issued the below command, I checked the diskgroup location from ASMCMD
SQL> alter database drop logfile group 31;
Database altered.
From ASMCMD, I can that the file has disappeared physically. Is this a new feature with 11.2.0.4 or am I missing something here ?
ASMCMD> ls +DATA/msblprd/onlinelog/group_31.548.833154995
ASMCMD-8002: entry 'group_31.548.833154995' does not exist in directory '+DATA/msblprd/onlinelog/'Just to add to what Aman has said.
It is a bad practice not to let OMF decide the placement of Online redo logs because of this issue especially when you use ASM.
Executing rm command in Linux/Unix is easy but Dropping ASM aliases in the disk group can be a hassle.
This is documented.
"When a redo log member is dropped from the database, the operating system file is not deleted from disk. Rather, the control files of the associated database are updated to drop the member from the database structure. After dropping a redo log file, ensure that the drop completed successfully, and then use the appropriate operating system command to delete the dropped redo log file."
http://docs.oracle.com/cd/E11882_01/server.112/e25494/onlineredo.htm#ADMIN11324
BTW . You don't even need to set db_create_online_log_dest_n to enable OMF for ORLs.
SQL> show parameter log_dest
NAME TYPE VALUE
db_create_online_log_dest_1 string
db_create_online_log_dest_2 string
db_create_online_log_dest_3 string
db_create_online_log_dest_4 string
db_create_online_log_dest_5 string
SQL> show parameter db_create_file_dest
NAME TYPE VALUE
db_create_file_dest string +MBL_DATA
alter database add logfile thread 4
group 31 ('+MBL_DATA','+MBL_FRA') size 4096M,
group 32 ('+MBL_DATA','+MBL_FRA') size 4096M,
group 33 ('+MBL_DATA','+MBL_FRA') size 4096M,
group 34 ('+MBL_DATA','+MBL_FRA') size 4096M ;
Database altered.
And redo logs will be neatly placed as shown below
INST GROUP# MEMBER STATUS ARC
4 31 +MBL_DATA/bsblprd/onlinelog/group_31.276.832605441 UNUSED YES
+MBL_FRA/bsblprd/onlinelog/group_31.297.832605445 UNUSED YES
32 +MBL_DATA/bsblprd/onlinelog/group_32.547.832605451 UNUSED YES
+MBL_FRA/bsblprd/onlinelog/group_32.372.832605457 UNUSED YES
33 +MBL_DATA/bsblprd/onlinelog/group_33.548.832605463 UNUSED YES
+MBL_FRA/bsblprd/onlinelog/group_33.284.832605469 UNUSED YES
34 +MBL_DATA/bsblprd/onlinelog/group_34.549.832605475 UNUSED YES
+MBL_FRA/bsblprd/onlinelog/group_34.359.832605481 UNUSED YES -
Question on redo log files at the standby
Oracle version: 10.2.0.5
Platform : AIX
We have 2 node RAC primary with 2 node RAC standby
Primary Instance1 named as cmapcp1
Primary Instance2 named as cmapcp2
Standby Instance1 named as cmapcp3
Standby Instance2 named as cmapcp4At standby side
SQL> show parameter log_file_name_convert
NAME TYPE VALUE
log_file_name_conver string cmapcp1, cmapcp3, cmapcp2, cmapcp4
Despite the value set for log_file_name_convert, I don't see any change in names of Online and Standby redo logs at the Standby site.
-- From primary
SQL> select member,type from v$logfile;
MEMBER TYPE
+CMAPCP_DATA01/cmapcp/cmapcp_log01.dbf ONLINE
+CMAPCP_DATA01/cmapcp/cmapcp_log02.dbf ONLINE
+CMAPCP_DATA01/cmapcp/cmapcp_log03.dbf ONLINE
+CMAPCP_DATA01/cmapcp/cmapcp_log04.dbf ONLINE
+CMAPCP_DATA01/cmapcp/cmapcp_log05.dbf ONLINE
+CMAPCP_DATA01/cmapcp/cmapcp_log06.dbf ONLINE
+CMAPCP_DATA01/cmapcp/cmapcp_log11.dbf STANDBY
+CMAPCP_DATA01/cmapcp/cmapcp_log12.dbf STANDBY
+CMAPCP_DATA01/cmapcp/cmapcp_log13.dbf STANDBY
+CMAPCP_DATA01/cmapcp/cmapcp_log14.dbf STANDBY
+CMAPCP_DATA01/cmapcp/cmapcp_log15.dbf STANDBY
+CMAPCP_DATA01/cmapcp/cmapcp_log16.dbf STANDBY
+CMAPCP_DATA01/cmapcp/cmapcp_log17.dbf STANDBY
+CMAPCP_DATA01/cmapcp/cmapcp_log18.dbf STANDBY
+CMAPCP_DATA01/cmapcp/cmapcp_log19.dbf STANDBY
+CMAPCP_DATA01/cmapcp/cmapcp_log20.dbf STANDBY
16 rows selected.-- From standby
SQL> select member,type from v$logfile;
MEMBER TYPE
+CMAPCP_DATA01/cmapcp/cmapcp_log01.dbf ONLINE
+CMAPCP_DATA01/cmapcp/cmapcp_log02.dbf ONLINE
+CMAPCP_DATA01/cmapcp/cmapcp_log03.dbf ONLINE
+CMAPCP_DATA01/cmapcp/cmapcp_log04.dbf ONLINE
+CMAPCP_DATA01/cmapcp/cmapcp_log05.dbf ONLINE
+CMAPCP_DATA01/cmapcp/cmapcp_log06.dbf ONLINE
+CMAPCP_DATA01/cmapcp/cmapcp_log11.dbf STANDBY
+CMAPCP_DATA01/cmapcp/cmapcp_log12.dbf STANDBY
+CMAPCP_DATA01/cmapcp/cmapcp_log13.dbf STANDBY
+CMAPCP_DATA01/cmapcp/cmapcp_log14.dbf STANDBY
+CMAPCP_DATA01/cmapcp/cmapcp_log15.dbf STANDBY
+CMAPCP_DATA01/cmapcp/cmapcp_log16.dbf STANDBY
+CMAPCP_DATA01/cmapcp/cmapcp_log17.dbf STANDBY
+CMAPCP_DATA01/cmapcp/cmapcp_log18.dbf STANDBY
+CMAPCP_DATA01/cmapcp/cmapcp_log19.dbf STANDBY
+CMAPCP_DATA01/cmapcp/cmapcp_log20.dbf STANDBY
16 rows selected.--- Another thing I noticed, v$log doesn't list Standby Redo Logs. This is expected behaviour , I guess
Below is the output from Primary and Standby (it is the same)
set linesize 200
set pagesize 50
col member for a50
break on INST SKIP PAGE on GROUP# SKIP 1
select l.thread# inst, l.group#,lf.member, lf.type
from v$log l , v$logfile lf
where l.group# = lf.group#
order by 1,2 ;
INST GROUP# MEMBER TYPE
1 1 +CMAPCP_DATA01/cmapcp/cmapcp_log01.dbf ONLINE
2 +CMAPCP_DATA01/cmapcp/cmapcp_log02.dbf ONLINE
3 +CMAPCP_DATA01/cmapcp/cmapcp_log03.dbf ONLINE
INST GROUP# MEMBER TYPE
2 4 +CMAPCP_DATA01/cmapcp/cmapcp_log04.dbf ONLINE
5 +CMAPCP_DATA01/cmapcp/cmapcp_log05.dbf ONLINE
6 +CMAPCP_DATA01/cmapcp/cmapcp_log06.dbf ONLINEJohn_75 wrote:
Thank you ckpt, mseberg.
I think log_file_name_convert is set wrongly as you've mentioned. But If I don't want to any change to name of Online or standby redo log files in standby, I don't have to set log_file_name_convert at all. Right ?From Same link
If you specify an odd number of strings (the last string has no corresponding replacement string), an error is signalled during startup. If the filename being converted matches more than one pattern in the pattern/replace string list, the first matched pattern takes effect. There is no limit on the number of pairs that you can specify in this parameter (other than the hard limit of the maximum length of multivalue parameters). -
BRARCHIVE backup for high volume offline redo log files on Standby Database
Hi All,
We are through with all of Standby database activity, also started applying the offline redo log files on the Standby site.
The throughput is not utilizing the actual available bandwith.
So we are not able to copy the offline redo files on time, as the offline redo files are piling up on the Production side.
My query is how we can parallely copy the offline redo log files on the DR site (ie. 4-5 redo files at a time).
Kindly guide for the same.
Regards,
Shaibazhi,
I have one doubt.
On other server (r3qas) the Umask settings are as followed
User UMASK value
<sid>adm 077
ora<SID> 077
root 077
Running SAP System : SAP R3 4.6C
Running DBMS : Oracle 9.0
Operating System :- HP_UX
On this system The new offline redo log files are created with 600 permissions. There is not a problem here, while taking the backup. I checked last "r3qas-archive" backups. There, i have not found any single error related to permissions, or any others (something like, Cannot open /oracle/RQ1/../.........dbf).
If everything is working fine, with this umask setting on this server, then, what's going wrong with the BW Quality server, which have the same umask settings (also others) for all the concerned users, as mentioned above.
Regards,
Bhavik Shroff -
Require 9i Primary and Standby redo logs files same size?
Hi,
We have 9.2.0.6 Oracle RAC (2 node) and configured data guard (physical standby).
I want to increase redo log files size, but i can't this do same time primary and standby side.
Is there a rule, primary and standby database instances have same size redo log files?
If I increase only primary redo log files, is there any side effect? However I try this issue on test system. I increased all primary redo log files(if status='INACTIVE' drop redo log group and add redo log group, switch logfile,...)
, but i couldn't changed standby side. So the system is work well. Is this correct solution or not? How can i increase both sides redo log files?
Thank you for helps..Thank you for your helps.. I found this issue answer:
http://download-west.oracle.com/docs/cd/B19306_01/server.102/b14239/manage_ps.htm#i1010448
Consequently, when you add or drop an online redo log file at the primary site, it is important that you synchronize the changes in the standby database by following these steps:
If Redo Apply is running, you must cancel Redo Apply before you can change the log files.
If the STANDBY_FILE_MANAGEMENT initialization parameter is set to AUTO, change the value to MANUAL.
Add or drop an online redo log file:
To add an online redo log file, use a SQL statement such as this:
SQL> ALTER DATABASE ADD LOGFILE '/disk1/oracle/oradata/payroll/prmy3.log' SIZE 100M;
To drop an online redo log file, use a SQL statement such as this:
SQL> ALTER DATABASE DROP LOGFILE '/disk1/oracle/oradata/payroll/prmy3.log';
Repeat the statement you used in Step 3 on each standby database.
Restore the STANDBY_FILE_MANAGEMENT initialization parameter and the Redo Apply options to their original states.
bye..
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