Checkpoint not complete 10g

Hi guys,
I have problem with big number of archived logs in 10.2.0.3 64bit database, so i have investigate a bit and found out that redolgs members size are 16 mb each, and when i looked in alert log i have found this:
Thu Sep 15 07:49:49 2011
Thread 1 cannot allocate new log, sequence 10611
Checkpoint not complete Current log# 1 seq# 10610 mem# 0: /db/rd01/redo01.log
Current log# 1 seq# 10610 mem# 1: /db/rd02/redo11.rdo
Thread 1 advanced to log sequence 10611
Current log# 2 seq# 10611 mem# 0: /db/rd01/redo02.log
Current log# 2 seq# 10611 mem# 1: /db/rd02/redo22.rdo
Thu Sep 15 07:50:01 2011
Thread 1 advanced to log sequence 10612
Current log# 3 seq# 10612 mem# 0: /db/rd01/redo03.log
Current log# 3 seq# 10612 mem# 1: /db/rdo33/redo33.rdo
Thread 1 cannot allocate new log, sequence 10613
Checkpoint not complete Current log# 3 seq# 10612 mem# 0: /db/rd01/redo03.log
Current log# 3 seq# 10612 mem# 1: /db/rd02/redo33.rdo
Thu Sep 15 07:50:15 2011
Thread 1 advanced to log sequence 10613
Current log# 1 seq# 10613 mem# 0: /db/rd01/redo01.log
Current log# 1 seq# 10613 mem# 1: /db/rd02/redo11.rdo
Thread 1 advanced to log sequence 10614
Current log# 2 seq# 10614 mem# 0: /db/rd01/redo02.log
Current log# 2 seq# 10614 mem# 1: /db/rd02/redo22.rdo
Then i have resized logfiles to 50mb and now i have this in my alert log:
Thread 1 advanced to log sequence 14377
Current log# 3 seq# 14377 mem# 0: /db/rd01/redo03.log
Current log# 3 seq# 14377 mem# 1: /db/rd02/redo33.rdo
Fri Sep 16 13:26:08 2011
Thread 1 cannot allocate new log, sequence 14378
Checkpoint not complete
Current log# 3 seq# 14377 mem# 0: /db/rd01/redo03.log
Current log# 3 seq# 14377 mem# 1: /db/rd02/redo33.rdo
Thread 1 advanced to log sequence 14378
Current log# 1 seq# 14378 mem# 0: /db/rd01/redo01.log
Current log# 1 seq# 14378 mem# 1: /db/rd02/redo11.rdo
Fri Sep 16 13:27:00 2011
Thread 1 cannot allocate new log, sequence 14379
Checkpoint not complete
Current log# 1 seq# 14378 mem# 0: /db/rd01/redo01.log
Current log# 1 seq# 14378 mem# 1: /db/rd02/redo11.rdo
Thread 1 advanced to log sequence 14379
Current log# 2 seq# 14379 mem# 0: /db/rd01/redo02.log
Current log# 2 seq# 14379 mem# 1: /db/rd02/redo22.rdo
Im aware that my redologs are too small, but how to determine best size? I have try this query:
select ACTUAL_REDO_BLKS,TARGET_REDO_BLKS,TARGET_MTTR,ESTIMATED_MTTR,
OPTIMAL_LOGFILE_SIZE,CKPT_BLOCK_WRITES from v$instance_recovery;
ACTUAL_REDO_BLKS TARGET_REDO_BLKS TARGET_MTTR ESTIMATED_MTTR OPTIMAL_LOGFILE_SIZE CKPT_BLOCK_WRITES
184,003 184,320 0 15 1,187,991
but it didnt gave me anything for OPTIMAL_LOGFILE_SIZE!
Any ideas?

rootsman wrote:
Hi guys,
I have problem with big number of archived logs in 10.2.0.3 64bit database, so i have investigate a bit and found out that redolgs members size are 16 mb each, and when i looked in alert log i have found this:
Thu Sep 15 07:49:49 2011
Thread 1 cannot allocate new log, sequence 10611
Checkpoint not complete Current log# 1 seq# 10610 mem# 0: /db/rd01/redo01.log
Current log# 1 seq# 10610 mem# 1: /db/rd02/redo11.rdo
Thread 1 advanced to log sequence 10611
Current log# 2 seq# 10611 mem# 0: /db/rd01/redo02.log
Current log# 2 seq# 10611 mem# 1: /db/rd02/redo22.rdo
Thu Sep 15 07:50:01 2011
Thread 1 advanced to log sequence 10612
Current log# 3 seq# 10612 mem# 0: /db/rd01/redo03.log
Current log# 3 seq# 10612 mem# 1: /db/rdo33/redo33.rdo
Thread 1 cannot allocate new log, sequence 10613
Checkpoint not complete Current log# 3 seq# 10612 mem# 0: /db/rd01/redo03.log
Current log# 3 seq# 10612 mem# 1: /db/rd02/redo33.rdo
Thu Sep 15 07:50:15 2011
Thread 1 advanced to log sequence 10613
Current log# 1 seq# 10613 mem# 0: /db/rd01/redo01.log
Current log# 1 seq# 10613 mem# 1: /db/rd02/redo11.rdo
Thread 1 advanced to log sequence 10614
Current log# 2 seq# 10614 mem# 0: /db/rd01/redo02.log
Current log# 2 seq# 10614 mem# 1: /db/rd02/redo22.rdo
Then i have resized logfiles to 50mb and now i have this in my alert log:
Thread 1 advanced to log sequence 14377
Current log# 3 seq# 14377 mem# 0: /db/rd01/redo03.log
Current log# 3 seq# 14377 mem# 1: /db/rd02/redo33.rdo
Fri Sep 16 13:26:08 2011
Thread 1 cannot allocate new log, sequence 14378
Checkpoint not complete
Current log# 3 seq# 14377 mem# 0: /db/rd01/redo03.log
Current log# 3 seq# 14377 mem# 1: /db/rd02/redo33.rdo
Thread 1 advanced to log sequence 14378
Current log# 1 seq# 14378 mem# 0: /db/rd01/redo01.log
Current log# 1 seq# 14378 mem# 1: /db/rd02/redo11.rdo
Fri Sep 16 13:27:00 2011
Thread 1 cannot allocate new log, sequence 14379
Checkpoint not complete
Current log# 1 seq# 14378 mem# 0: /db/rd01/redo01.log
Current log# 1 seq# 14378 mem# 1: /db/rd02/redo11.rdo
Thread 1 advanced to log sequence 14379
Current log# 2 seq# 14379 mem# 0: /db/rd01/redo02.log
Current log# 2 seq# 14379 mem# 1: /db/rd02/redo22.rdo
Im aware that my redologs are too small, but how to determine best size? I have try this query:
select ACTUAL_REDO_BLKS,TARGET_REDO_BLKS,TARGET_MTTR,ESTIMATED_MTTR,
OPTIMAL_LOGFILE_SIZE,CKPT_BLOCK_WRITES from v$instance_recovery;
ACTUAL_REDO_BLKS TARGET_REDO_BLKS TARGET_MTTR ESTIMATED_MTTR OPTIMAL_LOGFILE_SIZE CKPT_BLOCK_WRITES
184,003 184,320 0 15 1,187,991
but it didnt gave me anything for OPTIMAL_LOGFILE_SIZE!
Any ideas?Add redo log members to avoid the "eckpoint not complete" issue.
--neeraj

Similar Messages

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;
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0 0 66329842
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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,
Wes

The 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:
HAGGAR

Make 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

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.
thxs

when 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 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 complete

You 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.

Another 'Checkpoint not complete' case ....

Hi;
I getting some 'Checkpoint not complete' in log alert. This is not frecuently, however I understand this is not good.
my DB is Oracle 10G, RAC, two nodes.
I executed the next query, but I'm not clear how to determine the redo logs files size.
Can anybody explain me, if these values are OK?
SQL> set linesize 200
SQL> select * from v$log;
GROUP# THREAD# SEQUENCE# BYTES MEMBERS ARC STATUS FIRST_CHANGE# FIRST_TIM
1 1 8630 52428800 1 NO CURRENT 1320381521 16-MAR-10
2 1 8629 52428800 1 YES INACTIVE 1320220450 16-MAR-10
3 2 11341 52428800 1 NO CURRENT 1320386723 16-MAR-10
4 2 11340 52428800 1 YES INACTIVE 1320242239 16-MAR-10
Also, I executed the next query that somebody sent me, but the optimal size is empty.
SQL> SELECT TARGET_MTTR,ESTIMATED_MTTR,WRITES_MTTR,WRITES_LOGFILE_SIZE, OPTIMAL_LOGFILE_SIZE FROM V$INSTANCE_RECOVERY;
TARGET_MTTR ESTIMATED_MTTR WRITES_MTTR WRITES_LOGFILE_SIZE OPTIMAL_LOGFILE_SIZE
0 16 0 13413
As I explained previuosly, this problem is not frecuently, occurs two times in month, but my DB is not used at full capacity, but sometimes is experiencing some slowness, I don't know if fixing this, can help to solve this problem.
I was reading this thread, Checkpoint not complete but still I'm confused.
These are my doubts;
How can I determine the exact redo log files, I got now? I think is 2, but I'm not sure.
If I want to change that, to increase the redo size, how can I do that?
Does the DB needs to be shutdown to change this?
Thanks for your help.
Regards;
ANG

How can I determine the exact redo log files, I got now? I think is 2, but I'm not sure. You have 4 redo log groups, with 1 redologfile per group.
select member from v$logfile;
If I want to change that, to increase the redo size, how can I do that? You can resize the redolog file size by, Checking here
http://www.idevelopment.info/data/Oracle/DBA_tips/Database_Administration/DBA_34.shtml
Does the DB needs to be shutdown to change this?Nope. The database can be online.
HTH
-Anantha

Chronic checkpoint not complete message in alertlog file

Hi,
We have oracle 10g hosted on linux.i could see the following message in the alert log file.
Thread 1 cannot allocate new log, sequence 184070 Checkpoint not complete.
we have 3 redo log groups with 50MB size.
In the initparameter file:The following values were set.
log_checkpoint_interval = 0
log_checkpoint_timeout =1800
fast_start_mttr_target=0
Can some one guide me what needs to be done to avoid the chronic checkpoint not complete message in the alertlog file.
Thanks

Thank you. Even i listed the history of log switches per hour over the last week:
DAY 00:00 01:00 02:00 03:00 04:00 05:00 06:00 07:00 08:00 09:00 10:00 11:00 12:00 13:00 14:00 15:0
18/08 280 279 283 280 281 283 281 275 279 275 230 0 0 0 0 0 0 0
17/08 279 279 284 281 287 282 282 285 279 279 276 275 278 273 276 277 280
16/08 277 283 283 277 278 279 277 284 279 278 280 280 279 277 280 281 278
15/08 281 281 284 279 279 283 283 284 284 285 282 280 281 282 278 287 276
14/08 272 277 281 278 282 279 279 283 280 281 283 284 283 279 278 278 278
13/08 279 278 281 281 284 285 281 282 270 277 274 275 281 279 280 279 279
12/08 396 403 362 431 430 295 280 281 285 285 280 289 289 284 281 284 279
7 rows selected.

"checkpoint not complete" in alert log file.

Hi, all.
I have got a message of "Checkpoint not complete" in alert log file.
Thread 2 advanced to log sequence 531
Current log# 7 seq# 531 mem# 0: \\.\REDO231
Current log# 7 seq# 531 mem# 1: \\.\REDO232
Thread 2 cannot allocate new log, sequence 532
Checkpoint not complete
Current log# 7 seq# 531 mem# 0: \\.\REDO231
Current log# 7 seq# 531 mem# 1: \\.\REDO232
I searched "Checkpoint not complete" issue in this forum.
As solutions,
1. add more redo log groups
2. increase the size of redo log
3. check I/O contention
4. set LOG_CHECKPOINT_INTERVAL, LOG_CHECKPOINT_TIMEOUT or
FAST_START_MTTR_TARGET
I think No.4 is the possible first approach in our environment.
I think No.1 and No2 are not the ploblems in our environment.
I ask the above issue oracle support center, but
I was told that "if you are not getting this message frequently, you do not need to worry about it" from an oracle engineer.
Is this true?? If I am not getting this message frequently, there is no problem
in terms of database integrity, consistency, and performance?
I will be waiting for your advice and experience in real life.
Thanks and Regards.

Redo Log Tuning Advisory and Automatic Checkpoint Tuning are new features introduced in Oracle 10G, if you are on 10g you may benefit from these features.
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. As rule of thumb switching logs at most once every fifteen minutes.
Checkpoint frequency is affected by several factors, including log file size and the setting of the FAST_START_MTTR_TARGET initialization parameter. If the FAST_START_MTTR_TARGET parameter is set to limit the instance recovery time, Oracle automatically tries to checkpoint as frequently as necessary. Under this condition, the size of the log files should be large enough to avoid additional checkpointing due to under sized log files.
The redo logfile sizing advisory is specified by column optimal_logfile_size of v$instance_recovery. This feature require setting the parameter "fast_start_mttr_target" for the advisory to take effect and populate the column optimal_logfile_size.
Also you can obtain redo sizing advice on the Redo Log Groups page of Oracle Enterprise Manager Database Control.
To enable automatic checkpoint tuning, unset FAST_START_MTTR_TARGET or set it to a nonzero value(This is measured in seconds and by default, this feature is not enabled, because FAST_START_MTTR_TARGET has a default value of 0). If you set this parameter to zero this feature will be disabled. When you enable fast-start checkpointing, remove or disable(set to 0) the following initialization parameters:
- LOG_CHECKPOINT_INTERVAL
- LOG_CHECKPOINT_TIMEOUT
- FAST_START_IO_TARGET
Enabling fast-start checkpointing can be done statically using the initialization files or dynamically using -
SQL> alter system set FAST_START_MTTR_TARGET=10;
Best regards.

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?
Salman

871174 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

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
Pratheej

Anand... 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):
Oracle Database 11g                                                  11.2.0.3.0
Ci sono 1 prodotti installati in questa Oracle home.
Patch provvisorie (6) :
Patch 16167942     : applied on Sat May 18 11:50:42 CEST 2013
Unique Patch ID: 15646955
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
   Bugs fixed:
     16167942, 15841373, 14252187, 13877007, 14249514, 13891981, 12637294
     14511876, 14309075, 13736413, 12862170, 13901201, 12819999, 16019955
     15996520, 14775679, 13902963, 15924589, 14525739, 14744263, 12838063
     15910002, 14751895, 14107475, 13262857, 14641969, 15938047, 15982436
     13924173, 14761411, 16042648, 13337530, 14810890, 13605675, 7335665
     12686027, 16011871, 13729351, 13923995, 12813641, 12985237, 14600776
     14565062, 13066936, 14510516, 14192781, 14164191, 14505752, 15834269
     13559463, 14702500, 12345305, 14467027, 14807785, 14590564, 13849733
     13916549, 14755945, 15869211, 13365021, 13972394, 14193629, 14808639
     14189694, 13848402, 14226599, 13621258, 13827380, 14762511, 14064573
     13777449, 15848120, 14546673, 14546638, 14546575, 14469008, 14263073
     14263036, 14258925, 14205448, 14023636, 14035825, 13685544, 14040433
     13593999, 13026410, 12964067, 12873183, 12857027, 12345082, 14589750
     14668670, 13791678, 13769577, 13658087, 14230270, 13890080, 13810393
     13551402, 14644185, 13686047, 12583611, 14488943, 14176879, 13727644
     13517951, 13361350, 14373728, 13602883, 13580513, 10219624, 14645769
     14007968, 14827344, 9153183, 15853081, 14138130, 14168099, 14810093
     13845120, 14277586, 14271305, 13879428, 13938166, 12558569, 10260842
     14569263, 14100232, 13912373, 13653178, 14242977, 14102704, 14001941
     13993634, 13634583, 14828076, 13645875, 14398795, 13879553, 12940620
     14663556, 12327035, 14207902, 12557401, 14653598, 14587310, 14224606
     14577426, 14386985, 13783957, 12656350, 11836374, 14485163, 14624988
     14582487, 14332938, 14166276, 14479390, 14372670, 14038163, 13535104
     13744724, 14245087, 14305767, 14731193, 14313519, 14500723, 12928700
     12571916, 14245825, 13642044, 9706792, 13693929, 13903046, 14581922
     14142884, 14393900, 9778542, 13115786, 13427062, 14164849, 13399711
     11686700, 14175146, 14499293, 13615767, 14625969, 14513934, 14320472
     14613223, 13040943, 12812148, 14360965, 13911821, 14140535, 14204172
     13949042, 14367567, 9949330, 14467202, 14323857, 13834065, 13632653
     14110275, 13549808, 14196818, 13819727, 9751365, 10029609, 11846912
     12646510, 12766337, 12826115, 12860701, 12865360, 12973529, 13031176
     13040909, 13061085, 13066239, 13071375, 13111783, 13114306, 13345188
     13376866, 13393115, 13406688, 13408107, 13433178, 13459147, 13531801
     13553502, 13603792, 13608532, 13622539, 13622968, 13738130, 13961338
     14054189, 13851432, 14063422, 13973307, 14119388, 14282903, 14517263
     13716797, 14465787, 14613900, 14304758, 14251904, 14214257, 14153867
     14009845, 13889047, 13888719, 13820621, 13697828, 12663376, 11675721
     12889329, 13410987, 13965075, 13869978, 13843080, 13825231, 13582411
     13550689, 13023609, 13000491, 10418841, 10317921, 13523527, 13498267
     14096743, 14010695, 13947200, 14259185, 14280458, 14276345, 14543814
     13804294, 13718279, 13612575, 13430938, 13384182, 13377816, 13250244
     12794305, 12693626, 12352406, 12879628, 13534412, 13524698, 13743987
     14207317, 13918644, 14198511, 14088346, 12791981, 13011409, 13038684
     12865902, 12768840, 14076523, 13632809, 14458246, 13359289, 12794025
     9952132, 13780816, 12950694, 14162791, 13093358, 14255600, 13936424
     14301592, 14050233, 13528725, 14500052, 10146616, 14409183, 14324057
     14313389, 5918695, 12430142, 13399435, 13913630, 13732226, 10084752
     13591624, 14237793, 14013094, 10229475, 13078786, 14052474, 13637058
     12646746, 13000553, 14254795, 14215010, 13922729, 13942694, 12898637
     14309390, 13958038, 10214323, 13710236, 14115858, 14240544, 14158332
     13073613, 11074304, 13868705, 12723295, 13853654, 14074606, 13784384
     14386810, 14223718, 14018752, 13258936, 13723052, 12898020, 10625145
     14052871, 13076238, 13992002, 13242070, 12955701, 12693573, 14026888
     13984965, 13366199, 13843286, 13616375, 12839247, 8547978, 13714926
     13023854, 13910420, 11837095, 12842909, 12959852, 13632140, 13780035
     13860201, 13711083, 13628002, 13397104, 12358083, 13743357, 13945708
     10384051, 13591484, 13051250, 13727853, 12959627, 14095820, 5144934
     13657605, 13582702, 12966665, 13463131, 13773133, 12918738, 13099577
     13690409, 13645917, 11708510, 14042380, 13627489, 13652437, 12733042
     13907462, 13608299, 13624984, 9095696, 12794090, 9706532, 13469158
     13947480, 13555112, 13399236, 12910565, 13790109, 12552578, 13896848
     13737746, 13080778, 13458016, 13873885, 12312133, 12731940, 12672969
     13355095, 13981051, 13467683, 13457582, 13370330, 13340388, 12976376
     12797420, 12658411, 10133521, 9761357, 13827394, 13729832, 13851978
     13559770, 13592937, 13592919, 13478856, 13559540, 13641696, 13729808
     13632530, 14100237, 11071989, 13786142, 13839641, 13041324, 13857364
     13853089, 13806545, 13726162, 13657366, 13617861, 13604057, 13483672
     12959140, 12914722, 12910033, 12771830, 13776758, 13339443, 12680491
     10114953, 12966774, 13965211, 12424121, 13478060, 13786778, 13579992
     13705338, 13603613, 13476583, 12745662, 9190186, 13530646, 13520452
     9019231, 13610777, 12905053, 10263668, 13550185, 13385346, 13448206
     12772404, 13911711, 11072246, 13104881, 13863326, 12889054, 13775960
     13777823, 13464002, 11824898, 13535622, 13916709, 12880299, 12918338
     12529945, 13811209, 14058362, 13724808, 13885389, 13649031, 13350245
     13553883, 13388104, 13635347, 13404129, 13031118, 12530140, 13023541
     13767921, 13787482, 13641076, 13807411, 13724992, 12965899, 13791443
     12879027, 13584130, 13495307, 12594032, 13709220, 13247965, 13243072
     13683125, 13652493, 12957127, 10215977, 13014128, 13040331, 12857222
     12977501, 12664456, 12405931, 13525554, 13492863, 13573521, 13873471
     13366268, 13352423, 13460353, 12709476, 13652088, 13886023, 13942723
     12919564, 12894807, 12829021, 12612118, 11063191, 13503598, 13482688
     13354082, 13484963, 13395403, 13542159, 12983611, 13718476, 12846562
     9659614, 13326736, 11846902, 11665727, 13257247, 13588248, 13544396
     13566938, 13615517, 13425727, 13037709, 12730342, 12349553, 13502441
     13258062, 13251796, 13247273, 12659561, 12639013, 12594616, 11772838
     13570057, 12403721, 12585543, 12784549, 12834800, 12975771, 13040171
     13058950, 13063120, 13077335, 13365700, 13382280, 13384397, 13440516
     13454210, 13457537, 13477790, 13496250, 13501787, 13505390, 13506110
     13524899, 13572659, 13594712, 13617627, 13326289, 13555974, 13035360
     13420224, 13419660, 13036331, 13332439, 13420174, 12583826, 13358781
     11883969, 13524237, 12867713, 13328193, 13516727, 11865420, 13502183
     13259364, 13371153, 12998795, 13413168, 12897902, 13044108, 12971242
     12834027, 12620823, 13420516, 12849377, 12975811, 12646784, 12829429
     12538907, 12950823, 12848480, 12823838, 13366202, 13002015, 12834777
     13001901, 13017428, 13082238, 12965049, 11840910, 12656535, 12617123
     13073340, 12925041, 12938841, 13023632, 13066371, 12942119, 11877623
     12810890, 12995950, 12765467, 12934171, 13070939, 12535346, 12985184
     13103913, 12765868, 12622441, 12876314, 12820045, 13038806, 13090686
     12923168, 13362079, 12591252, 12718090, 12873909, 10350832, 12795861
     13039908, 12976590, 13017584, 12627504, 13263435, 12847466, 12797765
     12758736, 12878750, 12861463, 13024624, 12764337, 12662040, 13068077
     12914824, 13074261, 12668341, 12597906, 12932852, 13045518, 12897651
     12960925, 12728585, 13019958, 12902661, 12886827, 12913474, 3522216
     12678920, 12885323, 13334158, 12947871, 12896850, 13001955, 12784559
     12827166, 9703627, 12772345, 12905058, 13345868, 10357727, 12827493
     13004894, 12780983, 12842804, 13146719, 12655301, 12960302, 13085732
     12979199, 12638117, 13357509, 12401111, 12857064, 8631856, 13035804
     13355963, 12845115, 12695029, 12990582, 12971775, 12867511, 12917230
     12582664, 12849688, 12950644, 12588744, 13011520, 12899169, 12823042
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.

Checkpoint not complete 10g

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