PMON process and ORACLE Instance - Cannot allocate log. Archival required

Hello there,
We are running Oracle RAC (9i) database with two nodes and Oracle Applications 11i.The operatiing system is solaris 5.8.
1.Recently while bouncing the db, i happen to see many PMON process get started up? is it a normal thing to see those process? what is actually happening?
oracle 14125 1 1 05:02:36 ? 18:46 ora_p007_CMWPROD1
oracle 14123 1 1 05:02:36 ? 21:33 ora_p006_CMWPROD1
oracle 14117 1 3 05:02:34 ? 30:58 ora_p003_CMWPROD1
oracle 14121 1 1 05:02:35 ? 18:56 ora_p005_CMWPROD1
oracle 5230 1 0 21:45:54 ? 0:11 ora_qmn0_CMWPROD1
oracle 5192 1 0 21:45:09 ? 0:07 ora_pmon_CMWPROD1
oracle 5194 1 0 21:45:09 ? 1:37 ora_diag_CMWPROD1
oracle 5196 1 0 21:45:09 ? 0:48 ora_lmon_CMWPROD1
oracle 5198 1 0 21:45:09 ? 2:15 ora_lmd0_CMWPROD1
oracle 5200 1 0 21:45:12 ? 7:51 ora_lms0_CMWPROD1
oracle 5202 1 0 21:45:13 ? 7:59 ora_lms1_CMWPROD1
oracle 5204 1 0 21:45:13 ? 0:06 ora_dbw0_CMWPROD1
oracle 5206 1 0 21:45:13 ? 0:17 ora_lgwr_CMWPROD1
oracle 5208 1 0 21:45:13 ? 0:53 ora_ckpt_CMWPROD1
oracle 5210 1 0 21:45:13 ? 0:11 ora_smon_CMWPROD1
oracle 5212 1 0 21:45:13 ? 0:00 ora_reco_CMWPROD1
oracle 5214 1 0 21:45:13 ? 0:06 ora_cjq0_CMWPROD1
oracle 5218 1 0 21:45:13 ? 0:00 ora_arc0_CMWPROD1
oracle 5220 1 0 21:45:13 ? 0:05 ora_arc1_CMWPROD1
oracle 5223 1 0 21:45:17 ? 0:17 ora_lck0_CMWPROD1
oracle 14113 1 1 05:02:33 ? 5:30 ora_p002_CMWPROD1
oracle 14109 1 0 05:02:33 ? 5:14 ora_p000_CMWPROD1
oracle 14119 1 1 05:02:34 ? 21:03 ora_p004_CMWPROD1
oracle 14111 1 1 05:02:33 ? 6:12 ora_p001_CMWPROD1
2.We happen to see some notifications like
"Oracle instance <xxx> - cannot allocate log -Archival required" in the alert log file and could see many log switches in a second in archival destination.
we have three members of log groups (two in each group) in one node and same on the other. Should we have to increase log_buffer_size or addition of redo log files is required?
the error messages:
ORACLE Instance xxxx - Can not allocate log, archival required
ARCH: Connecting to console port...
Thread 2 cannot allocate new log, sequence 55487
All online logs needed archiving
Current log# 12 seq# 55486 mem# 0: /dev/vx/rdsk/racdg/log12a
Current log# 12 seq# 55486 mem# 1: /dev/vx/rdsk/racdg/log12b
Fri Oct 10 21:47:45 2008
Completed checkpoint up to RBA [0xd8be.2.10], SCN: 0x0000.e6dcbc2a
Fri Oct 10 21:47:49 2008
ARC0: Completed archiving log 7 thread 2 sequence 55482
ARC0: Evaluating archive log 10 thread 2 sequence 55480
ARC0: Unable to archive log 10 thread 2 sequence 55480
Log actively being archived by another process
ARC0: Evaluating archive log 9 thread 2 sequence 55483
ARC0: Beginning to archive log 9 thread 2 sequence 55483
Any suggestions to overcome these errors would be helpful.
Thanks,
Balu.

Tux Dueñas wrote:
Bueno.
A nosotros nos apasado el error de que no se puede guardar los archive logs por falta de espacio en Disco. Eso pasa cuando algun proceso genera demasiadas ransacciones que necesitan ser escritas en los logs. Por esa razon se genera mucho archive log y se llena el espacio en disco.
Borra los archivelog mas viejos, y que ya los tengas en un backup y asi no habra problema te recomiendo tener un espacio en disco minimo de 50%I hope this is what you meant,
>
We apas the error that you can not save the archive logs for lack of space on disk. That happens when any process that generates too many ransacciones need to be written in the logs. For that reason much archive log is generated and fills the space.
Removes archivelog older, and those who already have a backup and there will be no problem so I recommend you have a disk space minimum of 50%
>
This is an international forum so to spread your message as far as possible, use a more universal language, English for example can be a good choice.
Cheers
Aman....

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ARC0: Completed archiving log 1 thread 1 sequence 7004
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Thread 1 advanced to log sequence 7006
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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'
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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
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Database log mode Archive Mode
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Ok, that looked horrible. Let's try this again: 
 
I am writing a monitoring utility that will allow me to establish connections to both Oracle instances and LDAP repositories and query them to determine that they are up and running. My utility consists of a number of objects that handle connections to the LDAP and Oracle instances. I need to be able to do SSL and non-SSL connections to said instances. 
 
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***** 
 
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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

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this leads to
ORA-01034: ORACLE not available
ORA-27101: shared memory realm does not exist
SVR4 Error: 2: No such file or directory
still not able to identify the running oracle instance.
there is only one oracle home and the oraenv details are set with the correct values
verified the alert log(ora home details are matching with the env details), details of the oracle processes which are active are in the alert log along with the startup failures(mount errors) at the tail end
oracle sysdba is not able to identify the already running instance?
please help
newbie

PMON process and ORACLE Instance - Cannot allocate log. Archival required

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