PMON process and ORACLE Instance - Cannot allocate log. Archival required
500872Oct 10 2008 — edited Mar 19 2009Hello 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.