Checkpoint not complete.. Please help

Hi I am getting the following notification in my alert log..
Oracle Version : 10.2.0.1.0
Do I need to worry about this??
Checkpoint not complete
Current log# 6 seq# 18987 mem# 0: I:\ORACLE\ORADATA\AUTOPLNT\REDO06.LOG
Current log# 6 seq# 18987 mem# 1: I:\ORACLE\ORADATA\AUTOPLNT\REDO_LOGS\REDO06A.LOG
Thread 1 advanced to log sequence 18988
Current log# 5 seq# 18988 mem# 0: I:\ORACLE\ORADATA\AUTOPLNT\REDO05.LOG
Current log# 5 seq# 18988 mem# 1: I:\ORACLE\ORADATA\AUTOPLNT\REDO_LOGS\REDO05A.LOG
Regards,
Arun Kumar

Usually its there after the hot backup.. along with the checkpoint message i am getting below notification also..
Private strand flush not complete
I think after hot backup the redologs are written as tablespaces were in backup mode.. Am i right?
just now i found that it happens before hot backup also...
as we do swicth log file before the backup also it might be occuring right?
Rest of the day its smooth... no notification.. redo log files hardly switched for an hour..
Please advice...
Regards,
Arun

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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).
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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

"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.

Checkpoint not complete in DB13

Hi all,
I'm getting this warning message every day in the checkDB job of DB13 :
BR0976W Database message alert - level: WARNING, line: 193239, time: 2008-02-13 13.01.39, message:
Checkpoint not complete
BR0976W Database message alert - level: WARNING, line: 194490, time: 2008-02-14 00.32.58, message:
Checkpoint not complete
BR0976W Database message alert - level: WARNING, line: 194509, time: 2008-02-14 00.34.10, message:
Checkpoint not complete
BR0976W Database message alert - level: WARNING, line: 194630, time: 2008-02-14 01.25.17, message:
Checkpoint not complete
BR0976W Database message alert - level: WARNING, line: 194655, time: 2008-02-14 01.26.37, message:
Checkpoint not complete
Here is the content of the alert file at line 194655
Thu Feb 14 01:26:37 2008
Thread 1 cannot allocate new log, sequence 104916
Checkpoint not complete
Current log# 13 seq# 104915 mem# 0: G:\ORACLE\PRD\ORIGLOGA\LOG_G13M1.DBF
Current log# 13 seq# 104915 mem# 1: H:\ORACLE\PRD\MIRRLOGA\LOG_G13M2.DBF
Can someone helps me to solve that problem ?
Many thanks,
Alex

Hi
Follow the instructions below
1. Check at first if the problem only happens at times with an extraordinary high amount of redo logs.Check if it is possible to reduce the amount of redo log information being generated. If e.g. the "checkpoint not complete" situation only happens during online backups, you should make sure that the tablespaces are set into backup mode sequentially and not in parallel.
2. Check if there is a temporary or permanent I/O bottleneck related to DBWR. Possible indications are high values for the wait events "write complete waits", "free buffer waits" or "db file parallel write. In addition you can perform an ORADEBUG trace of the DBWR process. In case of doubts please also contact your hardware vendor. Especially if the database seems to get stuck with "checkpoint not complete" for a longer time (> 1 minute), (temporary) I/O problems are likely.
3. If "checkpoint not complete" occurs sporadically especially during times of high system load, you can increase the amount of redo log space or the number of DBWR processes:
a) Increase the size of the redo log files (e.g. double size) Increasing the size of the redo log files is particularly useful if there are small time frames between the log switches (< 1 minute during peak load). The disadvantage of big redo log files is the lower checkpoint frequency and the longer time Oracle needs for an instance recovery.
Hope this helps
Farooq

Checkpoint not completed

Hi All
In production system i see the following warning frequently in db13
BR0976W Database message alert - level: WARNING, line: 5447966, time: 2008-11-11 06.01.03, message:
Checkpoint not complete
BR0976W Database message alert - level: WARNING, line: 5447985, time: 2008-08-18 06.03.14, message:
Checkpoint not complete.
we have 8 groups of each 250 mb.
GROUP#      BYTES
        21 262144000
        22 262144000
        23 262144000
        24 262144000
        25 262144000
        26 262144000
        27 262144000
        28 262144000
db_writer_processes=    3
fast_start_mttr_target=   0
System information:
sapnetweaver bi 7
Oracle 10.2.0.2.0
HP-UX
I have gone through the couple of note still i coudnt find the solution.please help me in resolving the issue.
Thanks in advances

hi,
I use the following to take a look at how many log switches happen per hour.
With it you can see your peak times and you can figure out if you need to increase the log size and how much
set pagesize 1000
set linesize 160
select
to_char(first_time,'YYYY-MM-DD') day,
to_char(first_time,'DY') weekday,
   to_char(sum(decode(substr(first_time,10,2),'00',1,0)),'99') "00",
   to_char(sum(decode(substr(first_time,10,2),'01',1,0)),'99') "01",
   to_char(sum(decode(substr(first_time,10,2),'02',1,0)),'99') "02",
   to_char(sum(decode(substr(first_time,10,2),'03',1,0)),'99') "03",
   to_char(sum(decode(substr(first_time,10,2),'04',1,0)),'99') "04",
   to_char(sum(decode(substr(first_time,10,2),'05',1,0)),'99') "05",
   to_char(sum(decode(substr(first_time,10,2),'06',1,0)),'99') "06",
   to_char(sum(decode(substr(first_time,10,2),'07',1,0)),'99') "07",
   to_char(sum(decode(substr(first_time,10,2),'08',1,0)),'99') "08",
   to_char(sum(decode(substr(first_time,10,2),'09',1,0)),'99') "09",
   to_char(sum(decode(substr(first_time,10,2),'10',1,0)),'99') "10",
   to_char(sum(decode(substr(first_time,10,2),'11',1,0)),'99') "11",
   to_char(sum(decode(substr(first_time,10,2),'12',1,0)),'99') "12",
   to_char(sum(decode(substr(first_time,10,2),'13',1,0)),'99') "13",
   to_char(sum(decode(substr(first_time,10,2),'14',1,0)),'99') "14",
   to_char(sum(decode(substr(first_time,10,2),'15',1,0)),'99') "15",
   to_char(sum(decode(substr(first_time,10,2),'16',1,0)),'99') "16",
   to_char(sum(decode(substr(first_time,10,2),'17',1,0)),'99') "17",
   to_char(sum(decode(substr(first_time,10,2),'18',1,0)),'99') "18",
   to_char(sum(decode(substr(first_time,10,2),'19',1,0)),'99') "19",
   to_char(sum(decode(substr(first_time,10,2),'20',1,0)),'99') "20",
   to_char(sum(decode(substr(first_time,10,2),'21',1,0)),'99') "21",
   to_char(sum(decode(substr(first_time,10,2),'22',1,0)),'99') "22",
   to_char(sum(decode(substr(first_time,10,2),'23',1,0)),'99') "23"
from v$log_history
group by
to_char(first_time,'YYYY-MM-DD'),
to_char(first_time,'DY')
order by
to_char(first_time,'YYYY-MM-DD') desc;
You can play a little with it

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.

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, 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

CHECKDB-Checkpoint not complete

Hello,
After upgrade to oracle 10.2.0.4 from 9.2.0.8 when i run the CHECKDB i get a warning message as follows.
BR0974I Checking database messages in G:\ORACLE\PRD\SAPTRACE\BACKGROUND\alert_prd.log ...
BR0976W Database message alert - level: WARNING, line: 6335083, time: 2008-09-17 21.46.09, message:
Checkpoint not complete
BR0976W Database message alert - level: WARNING, line: 6335095, time: 2008-09-17 21.46.10, message:
Checkpoint not complete
BR0976W Database message alert - level: WARNING, line: 6335108, time: 2008-09-17 21.46.32, message:
Checkpoint not complete
BR0976W Database message alert - level: WARNING, line: 6335190, time: 2008-09-17 23.10.25, message:
Checkpoint not complete
BR0976W Database message alert - level: WARNING, line: 6335203, time: 2008-09-17 23.10.40, message:
Checkpoint not complete
BR0976W Database message alert - level: WARNING, line: 6335216, time: 2008-09-17 23.10.58, message:
Checkpoint not complete
BR0976W Database message alert - level: WARNING, line: 6335229, time: 2008-09-17 23.12.17, message:
Checkpoint not complete
Why is this occuring?
When i run it again immediately this warning message goes off?
Please give some idea why it is so?
Regards,
Siddhartha RV.

Hi,
this problem is related to redolog file size ,Increass the size of redolog files.
For more information .please followup the snote 79341.
click on below link
[https://websmp230.sap-ag.de/sap(bD1lbiZjPTAwMQ==)/bc/bsp/spn/sapnotes/index2.htm?numm=79341]
karan

Error CheckPoint not complete .

Hi Guru's
Could some one advice how to solve this problem which is found in the trace file ..
psvdbsp01 (oracle)[gisp]/db/gisp/dba/bdump$: tail -300 alert_gisp.log
Thread 1 cannot allocate new log, sequence 262393
Checkpoint not complete
Current log# 3 seq# 262392 mem# 0: /db/gisp/redolog/gisp_redo_3a.dbf
Current log# 3 seq# 262392 mem# 1: /db/gisp/mirrlog/gisp_redo_3b.dbf
Tue Mar 12 12:31:19 2013
Thread 1 advanced to log sequence 262393 (LGWR switch)
Current log# 4 seq# 262393 mem# 0: /db/gisp/redolog/gisp_redo_4a.dbf
Current log# 4 seq# 262393 mem# 1: /db/gisp/mirrlog/gisp_redo_4b.dbf
Tue Mar 12 12:42:51 2013
Starting control autobackup
Control autobackup written to SBT_TAPE device
comment 'API Version 2.0,MMS Version 5.4.1.0',
media '5950'
handle 'GISP_auto_cf_bkup_20130312_c-1206537362-20130312-02'
Tue Mar 12 12:44:29 2013
Thread 1 cannot allocate new log, sequence 262394
Checkpoint not complete
Current log# 4 seq# 262393 mem# 0: /db/gisp/redolog/gisp_redo_4a.dbf
Current log# 4 seq# 262393 mem# 1: /db/gisp/mirrlog/gisp_redo_4b.dbf
Tue Mar 12 12:44:29 2013
Thread 1 advanced to log sequence 262394 (LGWR switch)
Current log# 1 seq# 262394 mem# 0: /db/gisp/redolog/gisp_redo_1a.dbf
Current log# 1 seq# 262394 mem# 1: /db/gisp/mirrlog/gisp_redo_1b.dbf
Tue Mar 12 12:44:29 2013
Thread 1 advanced to log sequence 262395 (LGWR switch)
Current log# 2 seq# 262395 mem# 0: /db/gisp/redolog/gisp_redo_2a.dbf
Current log# 2 seq# 262395 mem# 1: /db/gisp/mirrlog/gisp_redo_2b.dbf
Tue Mar 12 12:44:30 2013
Thread 1 advanced to log sequence 262396 (LGWR switch)
Current log# 3 seq# 262396 mem# 0: /db/gisp/redolog/gisp_redo_3a.dbf
Current log# 3 seq# 262396 mem# 1: /db/gisp/mirrlog/gisp_redo_3b.dbf
Thread 1 cannot allocate new log, sequence 262397
Checkpoint not complete
Current log# 3 seq# 262396 mem# 0: /db/gisp/redolog/gisp_redo_3a.dbf
Current log# 3 seq# 262396 mem# 1: /db/gisp/mirrlog/gisp_redo_3b.dbf
Tue Mar 12 12:44:30 2013
Thread 1 advanced to log sequence 262397 (LGWR switch)
Current log# 4 seq# 262397 mem# 0: /db/gisp/redolog/gisp_redo_4a.dbf
Current log# 4 seq# 262397 mem# 1: /db/gisp/mirrlog/gisp_redo_4b.dbf
Thread 1 cannot allocate new log, sequence 262398
Checkpoint not complete
Current log# 4 seq# 262397 mem# 0: /db/gisp/redolog/gisp_redo_4a.dbf
Current log# 4 seq# 262397 mem# 1: /db/gisp/mirrlog/gisp_redo_4b.dbf
Tue Mar 12 12:44:32 2013
Thread 1 advanced to log sequence 262398 (LGWR switch)
Current log# 1 seq# 262398 mem# 0: /db/gisp/redolog/gisp_redo_1a.dbf
Current log# 1 seq# 262398 mem# 1: /db/gisp/mirrlog/gisp_redo_1b.dbf
Thread 1 cannot allocate new log, sequence 262399
Checkpoint not complete
Current log# 1 seq# 262398 mem# 0: /db/gisp/redolog/gisp_redo_1a.dbf
Current log# 1 seq# 262398 mem# 1: /db/gisp/mirrlog/gisp_redo_1b.dbf
Tue Mar 12 12:44:32 2013
Thread 1 advanced to log sequence 262399 (LGWR switch)
Current log# 2 seq# 262399 mem# 0: /db/gisp/redolog/gisp_redo_2a.dbf
Current log# 2 seq# 262399 mem# 1: /db/gisp/mirrlog/gisp_redo_2b.dbf
Thread 1 cannot allocate new log, sequence 262400
Checkpoint not complete
Current log# 2 seq# 262399 mem# 0: /db/gisp/redolog/gisp_redo_2a.dbf
Current log# 2 seq# 262399 mem# 1: /db/gisp/mirrlog/gisp_redo_2b.dbf
And the archive log list show's there is a lag in the sequence number ..
SQL> archive log list
Database log mode Archive Mode
Automatic archival Enabled
Archive destination /db/gisp/archive_logs_rman/
Oldest online log sequence 262432
Next log sequence to archive 262435
Current log sequence 262435
SQL>
Any expert suggestion is highly apprciated .
Thanks
Edited by: 790072 on 13/03/2013 15:18

Hi,
10Mb for logfile is very low.
You can check logswitch using this query:
SELECT SUM (DECODE (TO_CHAR (first_time, 'hh24'), '00', 1, 0)) "h0",
         SUM (DECODE (TO_CHAR (first_time, 'hh24'), '01', 1, 0)) "h1",
         SUM (DECODE (TO_CHAR (first_time, 'hh24'), '02', 1, 0)) "h2",
         SUM (DECODE (TO_CHAR (first_time, 'hh24'), '03', 1, 0)) "h3",
         SUM (DECODE (TO_CHAR (first_time, 'hh24'), '04', 1, 0)) "h4",
         SUM (DECODE (TO_CHAR (first_time, 'hh24'), '05', 1, 0)) "h5",
         SUM (DECODE (TO_CHAR (first_time, 'hh24'), '06', 1, 0)) "h6",
         SUM (DECODE (TO_CHAR (first_time, 'hh24'), '07', 1, 0)) "h7",
         SUM (DECODE (TO_CHAR (first_time, 'hh24'), '08', 1, 0)) "h8",
         SUM (DECODE (TO_CHAR (first_time, 'hh24'), '09', 1, 0)) "h9",
         SUM (DECODE (TO_CHAR (first_time, 'hh24'), '10', 1, 0)) "h10",
         SUM (DECODE (TO_CHAR (first_time, 'hh24'), '11', 1, 0)) "h11",
         SUM (DECODE (TO_CHAR (first_time, 'hh24'), '12', 1, 0)) "h12",
         SUM (DECODE (TO_CHAR (first_time, 'hh24'), '13', 1, 0)) "h13",
         SUM (DECODE (TO_CHAR (first_time, 'hh24'), '14', 1, 0)) "h14",
         SUM (DECODE (TO_CHAR (first_time, 'hh24'), '15', 1, 0)) "h15",
         SUM (DECODE (TO_CHAR (first_time, 'hh24'), '16', 1, 0)) "h16",
         SUM (DECODE (TO_CHAR (first_time, 'hh24'), '17', 1, 0)) "h17",
         SUM (DECODE (TO_CHAR (first_time, 'hh24'), '18', 1, 0)) "h18",
         SUM (DECODE (TO_CHAR (first_time, 'hh24'), '19', 1, 0)) "h19",
         SUM (DECODE (TO_CHAR (first_time, 'hh24'), '20', 1, 0)) "h20",
         SUM (DECODE (TO_CHAR (first_time, 'hh24'), '21', 1, 0)) "h21",
         SUM (DECODE (TO_CHAR (first_time, 'hh24'), '22', 1, 0)) "h22",
         SUM (DECODE (TO_CHAR (first_time, 'hh24'), '23', 1, 0)) "h23"
    FROM V$log_history
GROUP BY TRUNC (first_time), TO_CHAR (first_time, 'Dy')
ORDER BY 1;Oracle suggest 1 logswitch every 20 minutes, 3 per hour.
Please post the output of my query.
Regards

Checkpoint not complete.. Please help

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