Wed Dec 24 16:51:37 2008
Thread 1 advanced to log sequence 5323
Current log# 1 seq# 5323 mem# 0: /OMS/oms1/OMS/redo01.log
Wed Dec 24 16:51:52 2008
Thread 1 cannot allocate new log, sequence 5324
Checkpoint not complete
Current log# 1 seq# 5323 mem# 0: /OMS/oms1/OMS/redo01.log
Thread 1 advanced to log sequence 5324
Current log# 2 seq# 5324 mem# 0: /OMS/oms1/OMS/redo02.log
Wed Dec 24 18:45:54 2008
WARNING: inbound connection timed out (ORA-3136)
Wed Dec 24 18:56:01 2008
Thread 1 advanced to log sequence 5325
Current log# 3 seq# 5325 mem# 0: /OMS/oms1/OMS/redo03.log
It has something to do the the size of redo log.

Any one can help on this. thanks.