"Checkpoint not complete" hangs!
Hi everyone;
I see "Checkpoint not complete" in the alertlog but normally oracle just waits seconds then checkpoints and go on... But the problem is, database sometimes hangs with this message for minutes and never respond until i checkpoint manually.
I made the necessary changes to avoid "Checkpoint not complete" message. Number of Redolog groups was increased, redolog size was increased, 5 dbwr was configured.
But the real problem is not the message, oracle cannot go over this message and hangs!!
10.2.0.1.0 - on hp-ux 11.31
Thanks for your help...
Edited by: emre baransel on Sep 18, 2009 10:27 AM
emre baransel wrote:
Hi everyone;
I see "Checkpoint not complete" in the alertlog but normally oracle just waits seconds then checkpoints and go on... But the problem is, database sometimes hangs with this message for minutes and never respond until i checkpoint manually.Oracle hangs until released the checkpoint, this is an expected behaviour to be keep data consistency :
http://download.oracle.com/docs/cd/B19306_01/server.102/b14237/waitevents003.htm#sthref3113
Please, check the alert log file to see the time between redolog switch. Check if you have not I/O slowness on your hard drive.
I would advise the reading of Metalink note
Checkpoint Tuning and Troubleshooting Guide*
Doc ID: 147468.1*
Nicolas.
Similar Messages
-
Checkpoint not complete + db_writer_processes/dbwr_io_slaves
Hi,
Oracle Database 11g Release 11.1.0.6.0 - 64bit Production With the Real Application Clusters option.
After I noticed this error into the alert log:
Thread 2 cannot allocate new log, sequence 152831
Checkpoint not complete
Current log# 17 seq# 152830 mem# 0: +ONLINELOG/evodb/onlinelog/group_17.272.729333887
Thread 2 advanced to log sequence 152831
Current log# 14 seq# 152831 mem# 0: +ONLINELOG/evodb/onlinelog/group_14.269.729333871
And read a lot to understand the real cause (for the moment I increased the the redolog file from 5 to 7 (250mb each)).
As it seems I've no problem with the ARCH processes, I read that the cause can be the DBWR0 process that is not "fast" enough to write block I've into redos, and free them for archiving.
I read then something about the asynchronous I/O, and how db_writer_processes/dbwr_io_slaves can simulate the async write to disk.
I think I understood the difference between db_writer_processes and dbwr_io_slaves.
My question is how I can understand if my database needs more DBWR process.
At the moment my configuration is:
db_writer_processes 1
dbwr_io_slaves 0
Thanks in advance,
SamuelHi Samuel,
There is still a major confusion on your side concerning the DBWR. It will NOT write data from your redo buffers to the redo logs, since it is the job of the LGWR.
When a log switch occurs (so, you will use a different redo group), then it is the job of the ARCn process(es) to backup the 'used' redo log to a archive log.
When your ARCn process(es) are not fast enough, and a log swicth occurs, it may happen that you have no inactive (read archived) redo group.... then Oracle 'hangs' till it can find such a redo group available.
So, you may want to add 1 (or more) redo group, or increase the size of the redo log files, or have more archiver processes.
DBWr job is to write dirty database blocks back to datafiles.
CKPT also works independently of the LGWR and DBWR.
Check this:
http://www.dbasupport.com/forums/archive/index.php/t-5351.html
And another couple of links:
http://download.oracle.com/docs/cd/B19306_01/server.102/b14220/process.htm
Concepts of checkpoint, dbwr, lgwr processes
HTH,
Thierry
Edited by: Urgent-IT on Feb 10, 2011 5:33 PM
Added mote about CKPT + link
Edited by: Urgent-IT on Feb 10, 2011 5:37 PM
Added another 2 links -
At what point oracle write "Checkpoint not complete" in alert log ?
DB version: 10.2.0.4/RHEL 5.8
During a batch run, we encountered lots of 'Checkpoint not complete' errors in alert log.
Later we discovered that ORLs were sized only 50mb and this DB had only 3 redo log group. Since this is the potential cause, we are going create at least 10 Redo log groups and increase Redo log size to 500MB.
But , I want to know what exactly causes oracle to write "Checkpoint not complete" in alert log ?
For the purpose of this discussion, I am assuming we have only 1 ORL per redo log group. Is my below assumption correct ?
ORL1
|----------------> ORL1 file got full, so, LGWR starts writing to ORL2 file. Checkpoint occurs at log switch
| DBWR writes modified blocks associated with the redo entries in ORL1 to datafiles
|
V
ORL2
|----------------> ORL2 file got full, LGWR wants to start writing to ORL3 file. Checkpoint is initiated at log switch.
| But checkpoint can't be finished due to unknowN reasons
|
V
ORL3
|---------------->Your assumption is only partly right.
I would illustrate it like
ORL1
|
|----------------> ORL1 file got full, so, LGWR starts writing to ORL2 file. Checkpoint occurs at log switch
| DBWR starts writing modified blocks associated with the redo entries in ORL1 to datafiles
|
V
ORL2
|----------------> ORL2 file got full, LGWR starts writing to ORL3 file.
| Checkpoint for ORL2 is initiated at log switch.
|
V
ORL3
|
|----------------> ORL3 file (the last member) also got full very quickly . LGWR wants to start the 'new cycle' by
writing (Reusing) to ORL1. But the checkpoint intiated by the log switch of ORL1 from the previous cycle is
not complete yet !! .
Basically you get this error when LGWR attempts to reuse an online redo log file (ORL1 in the above example) and finds that it cannot.
This is because the remaining ORL files (ORL2 and ORL3) got fully written before DB writer finished checkpointing the modified blocks associated with ORL1 yet.
Until the checkpoint of ORL1 is complete, the DB effectively hangs and user sessions have to wait until LGWR can safely reuse ORL1
Yes a larger redo log size of 10 groups can help. But make sure the I/O subsytem where ORLs are stored has no latency issues. -
Checkpoint Not Complete in NOARCHIVELOG mode
Hi,
This is first time I am seeing this. In my 11.1.0.7 development database on SOLARIS, I see checkpoint not complete message in alert log file and my database is running in NOARCHIVELOG mode. Can any expert throw light on this that why this warning is there even in NOARCHIVELOG mode?
Salman871174 wrote:
Hi,
This is first time I am seeing this. In my 11.1.0.7 development database on SOLARIS, I see checkpoint not complete message in alert log file and my database is running in NOARCHIVELOG mode. Can any expert throw light on this that why this warning is there even in NOARCHIVELOG mode?
Salman,
The error doesn't have any relation to the archive log or no archive log mode of the database but to the size of the redo log files of yours and some other factors. The error basically means that you are not able to checkpoint your last current redo quickly enough before it can be reused. What's the size of the redo log files of yours?
Aman.... -
Checkpoint not complete in alert log file Oracle 11gR2 RAC
Hi,
I found checkpoint not complete in alert log file, almost every 3 seconds .
In metalink i saw for this error, archive_lag_target=0, already this value was set to 0 in my database.
We have 7 redo log groups for each instance, each group is of two redo log files, each file size is 50m.
To avoid this error what i need to do..........
please help me..................When you "checkpoint not complete" messages in your alert log this normally means your online redo logs are defined too small to handle the load and you have filled and need to switch to a new online redo log before the checkpoint triggered by the previous log switch has been completed.
Increasing your online redo log size is normally the fix for this.
HTH -- Mark D Powell --
PS - The following Oracle support document may also apply:
Checkpoint Not Complete In Alert.log Due To Setting Of Archive_lag_target [ID 435780.1]
Edited by: Mark D Powell on Nov 7, 2011 8:29 AM -
Oracle 10G Checkpoint not complete Cannot allocate new log
We have an oracle 10G database that has 4 groups of 200M redo logs. We are constantly seeing Checkpoint not complete followed by Cannot allocate new log.. messages in the alert log. When I look at the v$instance_recovery table I see this:
SQL> select WRITES_MTTR, WRITES_LOGFILE_SIZE, WRITES_LOG_CHECKPOINT_SETTINGS, WRITES_OTHER_SETTINGS,
2 WRITES_AUTOTUNE, WRITES_FULL_THREAD_CKPT from v$instance_recovery;
WRITES_MTTR WRITES_LOGFILE_SIZE WRITES_LOG_CHECKPOINT_SETTINGS
WRITES_OTHER_SETTINGS WRITES_AUTOTUNE WRITES_FULL_THREAD_CKPT
0 0 66329842
0 309461 41004
It seems most of our checkpointing is being caused by the log_checkpoint_interval being set to 10000, which means we are doing 20 checkpoints during one redo log since our OS blocksize is 1024. What I'm thinking about doing is first adding two more redo log groups, and then either increasing the log_checkpoint_interval to 40000 (5 checkpoints for one redo log) or unsetting log_checkpoint_interval and setting fast_start_mttr_target to 600. Which would be the recommended parameter change? I think Oracle recommends using the fast_start_mttr_target. Are there any other suggestions?Hi
>>unsetting log_checkpoint_interval and setting fast_start_mttr_target to 600.
its a better idea,look on it
http://download-uk.oracle.com/docs/cd/B19306_01/server.102/b14237/initparams068.htm#REFRN10058
Just set fast_start_mttr_target parameter.it will resolve ur problem.
Thanks
Kuljeet -
Problem about "Checkpoint not complete"
Dear Friends ,
I got the following error in my database 2 or 3 times a day . The error is :
Current log# 1 seq# 4127 mem# 0: /dbfs/oradata/ababil/redo01.log
Thread 1 cannot allocate new log, sequence 4128
Checkpoint not complete
I am using Oracle 10g database server where each redo log file size is 512 MB , and each of the file contains ONE member .
Our production server is used in a Private BANK .
In this moment How can I resolve this problem ?Hi,
Girish, I will try to figure out and you tell me the which is best.
Adding the Space or Size to the Existing Redo Log File Size, it will be effect the some time slack for performing the
Checkpoint as the Case concern with OP.
While comparing with scenario where we are adding the Extra Redo Log File, where the one extra Check point will increase in Cycle and as with respective need size/ space is increased (in terms), but the size of existence file is not changed.
I think better to add an Extra Redo Log File, Instead of increasing the Size of present Redo log file.
Let me know what you think... and please post your concerns and Suggestions.
- Pavan Kumar N -
Thread 1 cannot allocate new log, sequence 714 - Checkpoint not complete
I'm working in a Oracle 10g database, running on RHEL. The alert_*.log file is putting out this type of text for the past few months:
Thread 1 advanced to log sequence 713 (LGWR Switch)
Current log#2 seq# 713 mem# 0: /dbfiles/..../onlinelog/filename.log
Current log #2 ..........
Thread 1 cannot allocate new log, sequence 714
Checkpoint not complete
Any ideas to get me pointed in the right direction is appreciated,
Thank you in advance,
WesThe immediate fixes Vishal suggests are the standard answer, but there is more to it, as the MOS doc he references shows. Additional questions I would ask:
How long is the delay between the inability to switch and when it actually switches? How many datafiles do you have? What is waiting in the db?
In general, I find making log files sized for the rare massive updates, then using the built-in timeouts to switch every 20 or 30 minutes (depending on management recoverability expectations), helps avoid some of these problems. More specifically, run a statspack or awr (if licensed) report for maybe an hour during heavy times, and see what it thinks the waits are. Tuning is an iterative process, and sometimes different things can cause similar symptoms. Sometimes fixing the biggest problem (which is often poor SQL) can radically change the symptoms observed. Other times you find you have dying hardware, or someone messed up a switch configuration. -
Checkpoint not complete;;cannot allocate new log ;;; PLZ HELP ME
Hi all,
We are working on Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 on a Redhat Linux Server platform.
We are facing the following problem in the alert.log file :
Wed Aug 22 02:58:57 2007
Thread 1 cannot allocate new log, sequence 43542
Checkpoint not complete
Current log# 1 seq# 43541 mem# 0: /u01/oradata/DB01/redo01.log
Thread 1 advanced to log sequence 43542
Current log# 4 seq# 43542 mem# 0: /u01/oradata/DB01/redo04.log
Current log# 4 seq# 43542 mem# 1: /u01/oraindx/DB01/redo04.log
Wed Aug 22 03:00:00 2007
Thread 1 advanced to log sequence 43543
Current log# 5 seq# 43543 mem# 0: /u01/oradata/DB01/redo05.log
Current log# 5 seq# 43543 mem# 1: /u01/oraindx/DB01/redo05.log
Wed Aug 22 03:01:00 2007
Thread 1 cannot allocate new log, sequence 43544
Checkpoint not complete
Current log# 5 seq# 43543 mem# 0: /u01/oradata/DB01/redo05.log
Current log# 5 seq# 43543 mem# 1: /u01/oraindx/DB01/redo05.log
Thread 1 advanced to log sequence 43544
Current log# 6 seq# 43544 mem# 0: /u01/oradata/DB01/redo06.log
Current log# 6 seq# 43544 mem# 1: /u01/oraindx/DB01/redo06.log
Wed Aug 22 03:01:26 2007
Thread 1 advanced to log sequence 43545
Current log# 2 seq# 43545 mem# 0: /u01/oradata/DB01/redo02.log
Thread 1 advanced to log sequence 43546
Current log# 3 seq# 43546 mem# 0: /u01/oradata/DB01/redo03.log
Thread 1 advanced to log sequence 43547
Current log# 1 seq# 43547 mem# 0: /u01/oradata/DB01/redo01.log
Wed Aug 22 03:01:38 2007
Thread 1 cannot allocate new log, sequence 43548
Checkpoint not complete
Current log# 1 seq# 43547 mem# 0: /u01/oradata/DB01/redo01.log
I know that this message indicates that Oracle wants to reuse a redo log file, but
the current checkpoint position is still in that log. In this case, Oracle must
wait until the checkpoint position passes that log. Because the
incremental checkpoint target never lags the current log tail by more than 90%
of the smallest log file size, this situation may be encountered :
1-if DBWR writes too slowly,
or
2-if a log switch happens before the log is completely full,
or
3-if log file sizes are too small.
I read some posts in this forum regarding this error but sincerly i don't know how to find the exact cause of this error? Maybe Should I add new redo files or one new redo group? I don't know how to resolve it :( ;;;
such as I have 6 redo files 3 of them 5MB size and the others 3 files 10MB size ;
Thank you,
Regards,
Message was edited by:
HAGGARMake DBWR write more aggressively - as you are on 9i the parameter I would use is FAST_START_MTTR_TARGET=(how long you want recovery to take in seconds), the lower that number, the more aggressively DBWR has to write to keep up with the target, the advantage of this is that by the time LGWR comes to overwrite the redo log file, the chances are that DBWR has already written the "high scn#" (and beyond) from the checkpoint q.
-- This disadvantage is that you will get more I/O to your disks.
2. Create more redo log file groups - this will give DBWR more time to write before LGWR tries to overwrite a particular redolog file, again the chances are that the extra (6th) or (7th) group will give CKPT enough time to completely checkpoint beyond the "highest scn#" before that group is again required..
Which one to go for.. well that's up to you and your setup, if you have an I/O bound system then 2. would be better for you, as 1. will just increase your I/O problem, however if physical space is an issue and I/O isn't then 1. might be better (with the added advantage that instance recovery will also be faster).
Sorry for the training session, but as with everything to do with Oracle, there is rarely one solution that apply to everyone...
Gopu -
Cannot allocate new log, sequence Checkpoint not complete
Hi,
Im having very frequent log switches and Im getting error as
" cannot allocate new log, sequence Checkpoint not complete"
I was having 3 redo log groups with 50 MB each. After I found this error in the alert log; I increased teh number of redo log groups to 6 with 50MB each. Still the issue is not getting resolved.
Please suggest what will be the best solution for this.
Following is a snippet from alertlog.
==================================================
Sun Apr 19 09:14:08 2009
Thread 1 advanced to log sequence 5811
Current log# 2 seq# 5811 mem# 0: /u01/app/oracle/oradata/mview/redo02.log
Thread 1 cannot allocate new log, sequence 5812
Checkpoint not complete
Current log# 2 seq# 5811 mem# 0: /u01/app/oracle/oradata/mview/redo02.log
Sun Apr 19 09:14:18 2009
Thread 1 advanced to log sequence 5812
Current log# 3 seq# 5812 mem# 0: /u01/app/oracle/oradata/mview/redo03.log
Thread 1 cannot allocate new log, sequence 5813
Checkpoint not complete
Current log# 3 seq# 5812 mem# 0: /u01/app/oracle/oradata/mview/redo03.log
Thread 1 advanced to log sequence 5813
Current log# 1 seq# 5813 mem# 0: /u01/app/oracle/oradata/mview/redo01.log
Thread 1 cannot allocate new log, sequence 5814
Checkpoint not complete
Current log# 1 seq# 5813 mem# 0: /u01/app/oracle/oradata/mview/redo01.log
Sun Apr 19 09:14:32 2009
Thread 1 advanced to log sequence 5814
Current log# 2 seq# 5814 mem# 0: /u01/app/oracle/oradata/mview/redo02.log
Thread 1 cannot allocate new log, sequence 5815
Checkpoint not complete
Current log# 2 seq# 5814 mem# 0: /u01/app/oracle/oradata/mview/redo02.log
Thread 1 advanced to log sequence 5815
Current log# 3 seq# 5815 mem# 0: /u01/app/oracle/oradata/mview/redo03.log
Thread 1 cannot allocate new log, sequence 5816
Checkpoint not complete
Current log# 3 seq# 5815 mem# 0: /u01/app/oracle/oradata/mview/redo03.log
Sun Apr 19 09:14:44 2009
=========================================================
Regards
PratheejAnand... wrote:
Hi Sir,
Although i too had suggested increasing the redo logfile size, but after going through [http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:69012348056] i was little confused as Tom has mentioned
Another way is to make the log files smaller, hence increasing the frequency with which we checkpoint ---- Can you explain why so.
I was a little surprised when I read that posting - but noticed it was dated May 2000 - when databases were still quite small and less busy. (And Tom suggested 25MB as being "modest" rather than "tiny" - which is probably what many people would call 25MB these days). And May 2000 probably means 8.0 or 8.1 - and the whole log buffer, redo generation, checkpointing technology has changed a lot since then.
Basically, if you hit "checkpoint not complete", you need more online log space so that it's possible during the busiest times to keep generating redo log information while the checkpoint queues are being cleared far enough to allow older log files to be recycled.
You can do this by adding more log files, or by increasing the sizes of the log files you use. Tom's point, I think, was that if you chose the option to add more files and kept them small (or even made them smaller) then the volume of dirty data blocks that you could create while filling a log file would be small, so the database writer wouldn't have to do much work to make each log file available for re-use. (I'm not sure I'd agree with the approach, though - even for 8i - because it could easily lead to an increase in the volume of datablocks written, even if it did bypass the checkpoint issue).
Regards
Jonathan Lewis
http://jonathanlewis.wordpress.com
http://www.jlcomp.demon.co.uk
"For every expert there is an equal and opposite expert."
Arthur C. Clarke -
Thread 1 cannot allocate new log - Checkpoint not complete caused by small
Hello, one of my customers databases (setup by the customer) is running in archivelog mode. We find every day in the archivelog more than 10x the error "...cannot allocate new log - Checkpoint not complete "
The system has theese parameters:
select group#,members,bytes from v$log;
GROUP# MEMBERS BYTES
1 2 8388608
2 2 8388608
3 2 8388608
4 2 8388608
5 2 8388608
6 2 8388608
7 2 8388608
8 2 8388608
9 2 8388608
10 2 8388608
I asked the formder admin, why the redologs has only 8mb size. The answer was: "To find out, when there was big activity in the database. The count of archivelogs are bigger if you has small redologs. If you use some 250m redologs, we cannot see when tha database has big load. But this is important in case of recovery to recover the database to the point in time before the big load was has taken place." ... ???
Okay, if the customer wants to have 8 MB redologs ... I don´t care. But how can i prevent now the error message? The only way for me is to setup more redolog groups. But it would be very confusing to have 50 or 70 groups of redologs.
What can I do else to prevent the error?what is the log frequency?
logfile size?
can you check fast_start_mttr_target as well
check the following description:
Sometimes, you can see in your alert.log file, the following corresponding
messages:
Thread 1 advanced to log sequence 248
Current log# 2 seq# 248 mem# 0: /prod1/oradata/logs/redologs02.log
Thread 1 cannot allocate new log, sequence 249
Checkpoint not complete
This message indicates that Oracle wants to reuse a redo log file, but
the current checkpoint position is still in that log. In this case, Oracle must
wait until the checkpoint position passes that log. Because the
incremental checkpoint target never lags the current log tail by more than 90%
of the smallest log file size, this situation may be encountered if DBWR writes
too slowly, or if a log switch happens before the log is completely full,
or if log file sizes are too small.
When the database waits on checkpoints,redo generation is stopped until the
log switch is done.
Edited by: CKPT on Jul 19, 2010 7:37 PM -
Thread 1 cannot allocate new log, sequence 80064 - Checkpoint not complete
Hi,
from few days we have sometimes this message into alert. I've just try to increase the size of redo log file but without success, have you got any idea?
Thank you.
Wed Jul 30 00:08:05 2014
Beginning log switch checkpoint up to RBA [0x138bd.2.10], SCN: 4473445936
Thread 1 advanced to log sequence 80061 (LGWR switch)
Current log# 1 seq# 80061 mem# 0: F:\ORACLE\PRD\ORIGLOGA\LOG_G11M1.DBF
Current log# 1 seq# 80061 mem# 1: F:\ORACLE\PRD\MIRRLOGA\LOG_G11M2.DBF
Beginning log switch checkpoint up to RBA [0x138be.2.10], SCN: 4473445939
Thread 1 advanced to log sequence 80062 (LGWR switch)
Current log# 2 seq# 80062 mem# 0: F:\ORACLE\PRD\ORIGLOGB\LOG_G12M1.DBF
Current log# 2 seq# 80062 mem# 1: F:\ORACLE\PRD\MIRRLOGB\LOG_G12M2.DBF
Beginning log switch checkpoint up to RBA [0x138bf.2.10], SCN: 4473445942
Thread 1 advanced to log sequence 80063 (LGWR switch)
Current log# 3 seq# 80063 mem# 0: F:\ORACLE\PRD\ORIGLOGA\LOG_G13M1.DBF
Current log# 3 seq# 80063 mem# 1: F:\ORACLE\PRD\MIRRLOGA\LOG_G13M2.DBF
Wed Jul 30 00:08:06 2014
Archived Log entry 80064 added for thread 1 sequence 80061 ID 0x70061a1e dest 1:
Thread 1 cannot allocate new log, sequence 80064
Checkpoint not complete
Wed Jul 30 00:08:06 2014
Archived Log entry 80065 added for thread 1 sequence 80062 ID 0x70061a1e dest 1:
Current log# 3 seq# 80063 mem# 0: F:\ORACLE\PRD\ORIGLOGA\LOG_G13M1.DBF
Current log# 3 seq# 80063 mem# 1: F:\ORACLE\PRD\MIRRLOGA\LOG_G13M2.DBF
Wed Jul 30 00:08:08 2014
Archived Log entry 80066 added for thread 1 sequence 80060 ID 0x70061a1e dest 1:
Wed Jul 30 00:08:09 2014
Completed checkpoint up to RBA [0x138bd.2.10], SCN: 4473445936
Beginning log switch checkpoint up to RBA [0x138c0.2.10], SCN: 4473445946
Thread 1 advanced to log sequence 80064 (LGWR switch)
Current log# 4 seq# 80064 mem# 0: F:\ORACLE\PRD\ORIGLOGB\LOG_G14M1.DBF
Completed checkpoint up to RBA [0x138c0.2.10], SCN: 4473445946
Current log# 4 seq# 80064 mem# 1: F:\ORACLE\PRD\MIRRLOGB\LOG_G14M2.DBF
Archived Log entry 80067 added for thread 1 sequence 80063 ID 0x70061a1e dest 1:
Completed checkpoint up to RBA [0x138bf.2.10], SCN: 4473445942
Completed checkpoint up to RBA [0x138be.2.10], SCN: 4473445939========================================================
GENERIC OPATCH VERSION - FOR USE IN SAP ENVIRONMENT ONLY
========================================================
Oracle Installer di patch provvisorie versione 11.2.0.3.1
Copyright (c) 2012, Oracle Corporation. Tutti i diritti riservati.
Oracle Home : I:\oracle\PRD\11203
Central Inventory : C:\Program Files\Oracle\Inventory
from : n/a
OPatch version : 11.2.0.3.1
OUI version : 11.2.0.3.0
Log file location : I:\oracle\PRD\11203\cfgtoollogs\opatch\opatch2014-07-30_00-4
7-57AM_1.log
Lsinventory Output file location : I:\oracle\PRD\11203\cfgtoollogs\opatch\lsinv\
lsinventory2014-07-30_00-47-57AM.txt
Prodotti di livello superiore installati (1):
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Patch provvisorie (6) :
Patch 16167942 : applied on Sat May 18 11:50:42 CEST 2013
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Patch description: "ORACLE 11G 11.2.0.3 PATCH 15 BUG FOR WINDOWS (64-BIT AMD64
AND INTEL EM64)"
Created on 01 Feb 2013, 00:06:51 hrs PST8PDT
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Patch 14658090 : applied on Sat May 18 11:40:34 CEST 2013
Unique Patch ID: 15859799.1
Created on 27 Jan 2013, 08:31:45 hrs PST8PDT
Bugs fixed:
14658090
Patch 13575265 : applied on Sat May 18 11:40:14 CEST 2013
Unique Patch ID: 14606745
Created on 27 Feb 2012, 02:10:47 hrs PST8PDT
Bugs fixed:
13575265
Patch 13508485 : applied on Sat May 18 11:39:34 CEST 2013
Unique Patch ID: 14395138
Created on 21 Dec 2011, 13:23:38 hrs PST8PDT
Bugs fixed:
13508485
Patch 12325243 : applied on Sat May 18 11:38:51 CEST 2013
Unique Patch ID: 14243031
Created on 7 Nov 2011, 11:57:40 hrs PST8PDT
Bugs fixed:
12325243
Patch 9584028 : applied on Sat May 18 11:38:31 CEST 2013
Created on 22 Jun 2012, 11:39:40 hrs CEST
Bugs fixed:
9584028
OPatch succeeded. -
Thread 1 cannot allocate new log, sequence 1558 Checkpoint not complete
hi,
i m working on oracle 10g rac database on aix machine . i m getting this error on peck time
Thread 1 cannot allocate new log, sequence 1558 Checkpoint not complete
i read lots of documents and they asked to increase size of redo file or add more redo files.
can u plz describe me y m i getting this error ? & how adding redo file can help in this error.
thxswhen yours current redo log filled and then started to switch another log then checkpoint occurs ,this checkpoint started to write dirty buffer from buffer cache to datafile , you cannot reuse this logfile unless checkpoint process writes alls dirty buffer from buffer cache to disk which contained this redo log file.If you attempt to reuse the same log file which cause to checkpoint upon log switch then you will get this error.
Typically this error comes where yours number of redo log switches occuring too frequently or you have less number of redo logs.
lets say if you have 2 redolog file A and B,yours A redolog filled and then oracle switch from redo log A to B,checkpoint occurs,DBWRn started to write dirty buffer to disk meanwhile yours redo log B also get filled antoher log switch occurs to be attempt to reuse redo log file A ,but redo log A will not be entertain unless the previous checpoint completed to write alls dirty block from buffer cache to hard disk which is contained thats redo log A.
Adding redo log will be helpful in this case that redo log will switch to another new added redo log say C and A log file will get more time to be completed checkpoint which he/she contains contents.
Khurram -
Thread 1 cannot allocate new log, sequence 5720 Checkpoint not completed
Hi,
I can see a lot of messages like that:
Thread 1 cannot allocate new log, sequence 5720
Checkpoint not complete
What is the problem?? I think is about permissions.
What permissions do i need to give to log_archive_dest directory and redo log file directory??
Is the only thing that i can see that coulb be the problem because my HP-UX change the permissions of some directories sometimes and the SYS ADMIN don´t know how and why.
I can do:
SQL> alter system switch logfile;
System altered.
SQL> alter system checkpoint;
System altered.
Tks,
Paulo.Thread 1 cannot allocate new log, sequence 5720
Checkpoint not complete
What is the problem?Lgwr wants to switch to and reuse the "tail" redo group, but since checkpointing for that group is not yet completed, lgwr has to wait until all data, that the redo protects, has been written down to datafiles. This stops (temporarily) writing of redo from buffer to log files and you get that message in the alert.log.
How many redo log groups and what is their size? -
Thread 1 cannot allocate new log, sequence 1196,Checkpoint not complete
We were receiving the following messages in alert log. We have Oracle 10g R2 database having four redo log groups with two members each (50 MB). To overcome this error yesterday we added two more groups with same config. Again we received the same message in the alert log.
Alert Log contents:
Fri Dec 22 11:21:39 2006
Thread 1 cannot allocate new log, sequence 1193
Checkpoint not complete
Current log# 1 seq# 1192 mem# 0: /u02A/oradata/admin/origlogA/redo01.log
Thread 1 advanced to log sequence 1193
Current log# 5 seq# 1193 mem# 0: /u02A/oradata/admin/origlogA/redo05.log
Thread 1 cannot allocate new log, sequence 1194
Checkpoint not complete
Current log# 5 seq# 1193 mem# 0: /u02A/oradata/admin/origlogA/redo05.log
Current log# 5 seq# 1193 mem# 1: /u02B/oradaFri Dec 22 11:21:50 2006
Thread 1 advanced to log sequence 1194
Current log# 6 seq# 1194 mem# 0: /u02A/oradata/admin/origlogA/redo06.log
Current log# 6 seq# 1194 mem# 1: /u02B/oradata/admin/origlogB/redo06_2.log
Thread 1 advanced to log sequence 1195
Current log# 2 seq# 1195 mem# 0: /u02A/oradata/admin/origlogA/redo02.log
Current log# 2 seq# 1195 mem# 1: /u02B/oradata/admin/origlogB/redo02_2.log
Fri Dec 22 11:22:05 2006
Thread 1 cannot allocate new log, sequence 1196
Checkpoint not complete
Current log# 2 seq# 1195 mem# 0: /u02A/oradata/admin/origlogA/redo02.log
Current log# 2 seq# 1195 mem# 1: /u02B/oradata/admin/origlogB/redo02_2.log
Thread 1 advanced to log sequence 1196
Current log# 3 seq# 1196 mem# 0: /u02A/oradata/admin/origlogA/redo03.log
Current log# 3 seq# 1196 mem# 1: /u02B/oradata/admin/origlogB/redo03_2.log
Thread 1 cannot allocate new log, sequence 1197
Checkpoint not completeYou might not want to revivify threads from 2006. Create a new thread, including all the information to make it a [url http://catb.org/esr/faqs/smart-questions.html]smart question. Which version and patch level of Oracle are you on, which platform, how often are your logs switching, a relevant clip from your alert log surrounded by {noformat}{noformat} tags, etc.
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