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
Similar Messages
-
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 -
Alert log ---Thread 1 cannot allocate new log, sequence 1697
数据库环境为:AIX 6.1,Oracle 10.2.0.1 64位,今天在查看oracle alert log时发现如下信息
Sun Apr 29 16:03:43 2012
Thread 1 cannot allocate new log, sequence 8
Checkpoint not complete
Current log# 3 seq# 7 mem# 0: /oradata/hb/redo03.log
Thread 1 advanced to log sequence 8
Current log# 1 seq# 8 mem# 0: /oradata/hb/redo01.log
Sun Apr 29 17:28:02 2012
Thread 1 advanced to log sequence 9
Current log# 2 seq# 9 mem# 0: /oradata/hbbredo02.log
Sun Apr 29 19:10:39 2012
Thread 1 advanced to log sequence 10
Current log# 3 seq# 10 mem# 0: /oradata/hb/redo03.log
Sun Apr 29 21:23:34 2012
Thread 1 advanced to log sequence 11
Current log# 1 seq# 11 mem# 0: /oradata/hb/redo01.log
Sun Apr 29 22:09:31 2012
Thread 1 cannot allocate new log, sequence 12
Private strand flush not complete
Current log# 1 seq# 11 mem# 0: /oradata/hb/redo01.log
Thread 1 advanced to log sequence 12
Current log# 2 seq# 12 mem# 0: /oradata/hb/redo02.log
Thread 1 advanced to log sequence 13
Current log# 3 seq# 13 mem# 0: /oradata/hb/redo03.log
Mon Apr 30 06:15:20 2012
Thread 1 advanced to log sequence 14
Current log# 1 seq# 14 mem# 0: /oradata/hb/redo01.log
Mon Apr 30 10:04:39 2012
Memory Notification: Library Cache Object loaded into SGA
Heap size 2919K exceeds notification threshold (2048K)
SQL> select * from v$logfile;
GROUP# STATUS TYPE
MEMBER
IS_
1 ONLINE
/oradata/hb/redo01.log
NO
2 ONLINE
/oradata/hb/redo02.log
NO
GROUP# STATUS TYPE
MEMBER
IS_
3 ONLINE
/oradata/hb/redo03.log
NO
数据库当前运行正常,请教一下,
1. 频繁出现的类似
Thread 1 cannot allocate new log, sequence 12
Private strand flush not complete
Current log# 1 seq# 11 mem# 0: /oradata/hb/redo01.log 是怎么造成的?是否需要处理,如果处理,该怎么做?
2。 Memory Notification: Library Cache Object loaded into SGA
Heap size 2919K exceeds notification threshold (2048K)显示heap 值超过设定的阀值,heap起什么作用,是否需要修改阀值,以消除这一"Memory Notification"?Thread 1 cannot allocate new log, sequence 12
Private strand flush not complete
由"Private strand flush not complete"引起的 cannot allocate new log一般可以忽略, Private strand是10g引入的新特性
Heap size 2919K exceeds notification threshold (2048K)
该信息是由于 10.2.0.1 这个版本的默认 "_kgl_large_heap_warning_threshold" 参数过小, 一般可以忽略。
调整个 "_kgl_large_heap_warning_threshold" 参数和 升级到10.2.0.1 版本均可以 让该"Heap size 2919K exceeds notification threshold (2048K)"信息不再出现, 当然一般也可以忽略该问题 -
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. -
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 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.
-
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):
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
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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 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:Checkpoint not complete
Hai,
i got this statement frequently in alert log file.
current database in non archive log mode and 2 log groups with each 2 members.
tell me how to overcome this issue.
regards
dbaThis may be helpful:
cannot allocate new log
Cannot allocate new log
cannot allocate new log, sequence xxxx
Cheers,
A. -
Cannot allocate new log&Private strand flush not complete
There are two Oracle10g(10.2.0.5) Database running on SUN M5000(SPARC64 VII 2.53 GHz Quad-Core Processors*4/32GB Memory).
The first Oracle10g DB is running with 8GB SGA and 1GB PGA, the second Oracle10g DB is runing with 7GB SGA and 2GB PGA.
We encountered a issue on the second Oracle DB. When we manually switch the online redo logs with an alter system command as below.
SQL> alter system switch logfile;
The Alert log will display the following messages:
Thread 1 cannot allocate new log, sequence xxx
Private strand flush not complete .
All other Oracle10g DB will not occur "Private strand flush not complete" messages except for the second Oracle10g DB. I want to know the detail reason.
I also saw two Doc ID:[ID 372557.1] and [ID 435887.1] from Oracle Metalink. But I am not satisfacted with what they wrote.
My last target to resolve the issue.
Anyone help me ?
I am kylix.
[email protected]hi
Hemant
iam very new to this field,since 20 days i am having one big problem in my databases,i have 2 database in my windows server environment ,recently i have upgrade my both the database from 10g to 11g.Why i upgrade means in 10g iam getting error ora-07445 access violation,in my alertlog file (when iam going to take full database backup through export getting this error in logfile and export stops with error) so i thought to apply the patch,but with discussion with my manager and team, we all thought this is the time to upgrade so we changed to 11g
then 11g upgrade is 100% successfully completed, to verify the export on 11g ,i thought to take logical backup of my 2 database's
C:\Users\Administrator>exp system/password@tnsname file=full_05_1_2013.dmp log=05_1_2013.log full=y
Export: Release 11.2.0.1.0 - Production on Sat Jan 19 09:18:06 2013
Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
Export done in WE8ISO8859P1 character set and AL16UTF16 NCHAR character set
server uses AR8MSWIN1256 character set (possible charset conversion)
About to export the entire database ...
. exporting tablespace definitions
. exporting profiles
. exporting user definitions
. exporting roles
. exporting resource costs
. exporting rollback segment definitions
. exporting database links
. exporting sequence numbers
. exporting directory aliases
. exporting context namespaces
. exporting foreign function library names
. exporting PUBLIC type synonyms
. exporting private type synonyms
. exporting object type definitions
. exporting system procedural objects and actions,
what happening here is it just coming to this point and stopping here for hours............more than 10 hours (I have to kiill this session manually).I tried with single user its working but when i take full backup of database export , then it not working,,, i have cross check every possibilities by giving full privilages,space check,and many other but no solution, i was unable to take full backup ,(but i can take single user backup)
i have even applied bundle patch (Oracle® Database Server Version 11.2.0.1 Patch 16) 100% sucessfully but the error continious)))))))))))))))))))))))))))))))))))
NOTE:___one more twist here is , when i bounce the database then i can take full database backup with out error and warnings for 6 to 7 times then again at 8th time its again stopping at above point.......................................................(when i need full logical backup again i need to bounce the db)
what for its stopping here, why it is not going forward,,, its issue with both the database's same,
NOTE:ERROR IN MY ALERTLOG FILE AND TRACEFILE IS
trace file d:\app\admin\diag\rdbms\memfa\memfa\trace\memfa_j000_7844.trc
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
Windows NT Version V6.0 Service Pack 2
CPU : 16 - type 8664, 16 Physical Cores
Process Affinity : 0x0x0000000000000000
Memory (Avail/Total): Ph:1148M/16379M, Ph+PgF:17118M/32914M
Instance name: abha210
Redo thread mounted by this instance: 1
Oracle process number: 22
Windows thread id: 7844, image: ORACLE.EXE (J000)
*** 2013-01-17 12:00:00.124
*** SESSION ID:(196.16104) 2013-01-17 12:00:00.124
*** CLIENT ID:() 2013-01-17 12:00:00.124
*** SERVICE NAME:(SYS$USERS) 2013-01-17 12:00:00.124
*** MODULE NAME:(DBMS_SCHEDULER) 2013-01-17 12:00:00.124
*** ACTION NAME:(PURGE_LOG) 2013-01-17 12:00:00.124
purge queue_table SYS.SCHEDULER_FILEWATCHER_QT
purge queue_table SYS.SCHEDULER$_EVENT_QTAB
alertlogfile___________________________
Thread 1 cannot allocate new log, sequence 123
Private strand flush not complete
Current log# 4 seq# 122 mem# 0: D:\APP\ADMIN\ORADATA\memfa\REDO04.LOG
Thread 1 advanced to log sequence 123 (LGWR switch)
Current log# 5 seq# 123 mem# 0: D:\APP\ADMIN\ORADATA\memfa\REDO05.LOG
already i have change my redo log to 50 to 500 each(3) and increase retention time too
i have tried for more than 50 time by running full database export command ,but its not working ,sometimes 24 hours till at that point only(if i bounce the both the database's then,full database export completes in 9 min(successfully without error and without warnings
these are veru new databases size nearly 8gb each
please assist/help me in solving this issue, -
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. -
Which parameter to change to avoid "cannot allocate new log"
Hello Everyone.
I'm running 9i r2 on windows 2003 SD edition server with ISCSI attached. on the ISCSI drive i have 1 group of redo logs together with DBF's in the data directory. The other 2 redo groups are on the 2 separate local disks together with archive logs (in another folder).
I'm getting a few "cannot allocate new log" errors every couple of days and in the event viewer "Archive process error: ORACLE Instance prdps - Can not allocate log, archival required"
I'm not sure which parameter i should change.
Current setup:
db_writer_processes 1
dbwr_io_slaves 0
Here is the output from v$sysstat:
49 DBWR checkpoint buffers written 8 7410575
50 DBWR transaction table writes 8 7748
51 DBWR undo block writes 8 4600265
52 DBWR revisited being-written buffer 8 5313
53 DBWR make free requests 8 26383
54 DBWR free buffers found 8 19838373
55 DBWR lru scans 8 21831
56 DBWR summed scan depth 8 21265425
57 DBWR buffers scanned 8 21265425
58 DBWR checkpoints 8 1719
59 DBWR cross instance writes 40 0
60 DBWR fusion writes 40 0
This is from alert.log:
Fri Mar 06 00:25:52 2009
ARC0: Completed archiving log 1 thread 1 sequence 7004
Fri Mar 06 00:25:54 2009
Thread 1 advanced to log sequence 7006
Current log# 3 seq# 7006 mem# 0: E:\ORACLE\ORADATA\PRDPS\REDO03A.LOG
Current log# 3 seq# 7006 mem# 1: F:\ORACLE\ORADATA\PRDPS\REDO03B.LOG
Current log# 3 seq# 7006 mem# 2: G:\ORACLE\ORADATA\PRDPS\REDO03C.LOG
Fri Mar 06 00:25:54 2009
ARC1: Evaluating archive log 2 thread 1 sequence 7005
ARC1: Beginning to archive log 2 thread 1 sequence 7005
Creating archive destination LOG_ARCHIVE_DEST_1: 'F:\ORACLE\ORADATA\PRDPS\ARCHIVE\PRDPS_001_07005.ARC'
Fri Mar 06 00:26:03 2009
Thread 1 advanced to log sequence 7007
Current log# 1 seq# 7007 mem# 0: E:\ORACLE\ORADATA\PRDPS\REDO01A.LOG
Current log# 1 seq# 7007 mem# 1: F:\ORACLE\ORADATA\PRDPS\REDO01B.LOG
Current log# 1 seq# 7007 mem# 2: G:\ORACLE\ORADATA\PRDPS\REDO01C.LOG
Fri Mar 06 00:26:03 2009
ARC0: Evaluating archive log 2 thread 1 sequence 7005
ARC0: Unable to archive log 2 thread 1 sequence 7005
Log actively being archived by another process
ARC0: Evaluating archive log 3 thread 1 sequence 7006
ARC0: Beginning to archive log 3 thread 1 sequence 7006
Creating archive destination LOG_ARCHIVE_DEST_1: 'F:\ORACLE\ORADATA\PRDPS\ARCHIVE\PRDPS_001_07006.ARC'
Fri Mar 06 00:26:15 2009
ARC1: Completed archiving log 2 thread 1 sequence 7005
ARC1: Evaluating archive log 3 thread 1 sequence 7006
ARC1: Unable to archive log 3 thread 1 sequence 7006
Log actively being archived by another process
Fri Mar 06 00:26:16 2009
Thread 1 cannot allocate new log, sequence 7008
All online logs needed archiving
Current log# 1 seq# 7007 mem# 0: E:\ORACLE\ORADATA\PRDPS\REDO01A.LOG
Current log# 1 seq# 7007 mem# 1: F:\ORACLE\ORADATA\PRDPS\REDO01B.LOG
Current log# 1 seq# 7007 mem# 2: G:\ORACLE\ORADATA\PRDPS\REDO01C.LOG
Thread 1 advanced to log sequence 7008
Current log# 2 seq# 7008 mem# 0: E:\ORACLE\ORADATA\PRDPS\REDO02A.LOG
Current log# 2 seq# 7008 mem# 1: F:\ORACLE\ORADATA\PRDPS\REDO02B.LOG
Current log# 2 seq# 7008 mem# 2: G:\ORACLE\ORADATA\PRDPS\REDO02C.LOG
Fri Mar 06 00:26:16 2009
ARC1: Evaluating archive log 3 thread 1 sequence 7006
ARC1: Unable to archive log 3 thread 1 sequence 7006
Log actively being archived by another process
ARC1: Evaluating archive log 1 thread 1 sequence 7007
ARC1: Beginning to archive log 1 thread 1 sequence 7007
Should i just change
db_writer_processes 1
dbwr_io_slaves 2
Thank you
Any help appreciated.This message indicates that Oracle wants to reuse a redo log file, but
the
corresponding checkpoint associated is not terminated. In this case,
Oracle
must wait until the checkpoint is completely realized. This situation
may be encountered particularly when the transactional activity is
important.
check for:
- Background checkpoint started.
- Background checkpoint completed.
These two statistics must not be different more than once. If this is
not true, your database hangs on checkpoints. LGWR is unable to
continue
writing the next transactions until the checkpoints complete.
Three reasons may explain this difference:
- A frequency of checkpoints which is too high.
- A checkpoints are starting but not completing
- A DBWR which writes too slowly.
The way to resolve incomplete checkpoints is through tuning
checkpoints and
logs:
1) Give the checkpoint process more time to cycle through the logs
- add more redo log groups
- increase the size of the redo logs
2) Reduce the frequency of checkpoints
- increase LOG_CHECKPOINT_INTERVAL
- increase size of online redo logs
3) Improve the efficiency of checkpoints enabling the CKPT process
with CHECKPOINT_PROCESS=TRUE
4) Set LOG_CHECKPOINT_TIMEOUT = 0. This disables the checkpointing
based on
time interval.
5) Another means of solving this error is for DBWR to quickly write
the dirty
buffers on disk. The parameter linked to this task is:
DB_BLOCK_CHECKPOINT_BATCH.
DB_BLOCK_CHECKPOINT_BATCH specifies the number of blocks which are
dedicated
inside the batch size for writing checkpoints. When you want to
accelerate
the checkpoints, it is necessary to increase this value. -
Hello,
I use Oracle 10.2. I have 3 redo groups, two members in each. I lost member of redo2 group, added it (alter system drop logfile member/alter system add logfile member). NOw I am getting alerts:
Thread 1 advanced to log sequence xx
Current log# 2 seq# (...) /redo02.log
Current log# 2 seq# (...) /redo02b.log <- this is the one that was lost
Thread 1 cannot allocate new log, sequence xxx
Checkpoint not complete
Current log# 2 seq# (...) /redo02.log
Current log# 2 seq# (...) /redo02b.log
Tue Mar 04 (..)
Thread 1 advanced to log sequence xxx
Current log# 3 seq# (...) /redo03.log
Current log# 3 seq# (...) /redo03b.log
I've read previous posts about it, but my problems seems to me to be different, because before losing that redo member I didn't have any alerts. Only after adding it again I have. I neither change anything in number of redo groups nor in redo member sizes.
Greets
A.The message has nothing to do with your dropping and adding a member.
The "checkpoint not complete" indicates that the Checkpoint that Oracle
implicitly issued when switching out of a log group hadn't completed by the
time the logwriter came around back to the same log group.
The checkpoint is taking approximately the same time as it takes the logwriter
to cycle through your 3 groups. Group 2 just happens to be the boundary case.
You should either
a Add more groups
b Add new groups of larger sizes and drop the existing groups (of smaller sizes).
Maybe you are looking for
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