Oracle Database Discussions

env： hpux ia 11.31 superdome 128 cpu 1T memory memory_target 450G other parameters such as sga_max_size pga automatic..
rac base on asm.
now: A node can open database normally.but when i start the other node, and it does not work well. at alert log:
hu Jul 29 18:51:25 2010
Adjusting the default value of parameter parallel_max_servers
from 1280 to 1185 due to the value of parameter processes (1200)
Starting ORACLE instance (normal)
LICENSE_MAX_SESSION = 0
LICENSE_SESSIONS_WARNING = 0
Interface type 1 lan900 192.168.3.0 configured from GPnP Profile for use as a cluster interconnect
Interface type 1 lan901 10.1.6.0 configured from GPnP Profile for use as a public interface
Picked latch-free SCN scheme 3
Thu Jul 29 18:53:04 2010
Using LOG_ARCHIVE_DEST_1 parameter default value as USE_DB_RECOVERY_FILE_DEST
WARNING: db_recovery_file_dest is same as db_create_file_dest
Autotune of undo retention is turned on.
LICENSE_MAX_USERS = 0
SYS auditing is disabled
Starting up:
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Partitioning, Real Application Clusters, OLAP, Data Mining
and Real Application Testing options.
Using parameter settings in server-side pfile /app/oracle/product/11.2.0/db_1/dbs/initPRODB2.ora
System parameters with non-default values:
processes = 1200
sessions = 1920
spfile = "+DGFLASH_OCR_ARCH/prodb/spfileprodb.ora"
memory_target = 419328M
control_files = "+DGFLASH_OCR_ARCH/prodb/controlfile/current.276.724289477"
control_files = "+DGFLASH_OCR_ARCH/prodb/controlfile/current.277.724289477"
db_block_size = 8192
compatible = "11.2.0.0.0"
cluster_database = TRUE
db_create_file_dest = "+DGFLASH_OCR_ARCH"
db_recovery_file_dest = "+DGFLASH_OCR_ARCH"
db_recovery_file_dest_size= 450000M
thread = 2
undo_tablespace = "UNDOTBS2"
instance_number = 2
remote_login_passwordfile= "EXCLUSIVE"
db_domain = ""
dispatchers = "(PROTOCOL=TCP) (SERVICE=PRODBXDB)"
remote_listener = "scan_vip:1521"
audit_file_dest = "/app/oracle/admin/PRODB/adump"
audit_trail = "DB"
db_name = "PRODB"
open_cursors = 300
diagnostic_dest = "/app/oracle"
Cluster communication is configured to use the following interface(s) for this instance
192.168.3.2
cluster interconnect IPC version:Oracle UDP/IP (generic)
IPC Vendor 1 proto 2
Thu Jul 29 18:55:06 2010
Errors in file /app/oracle/diag/rdbms/prodb/PRODB2/trace/PRODB2_ora_6485.trc (incident=86401):
ORA-00445: background process "PMON" did not start after 120 seconds
Incident details in: /app/oracle/diag/rdbms/prodb/PRODB2/incident/incdir_86401/PRODB2_ora_6485_i86401.trc
USER (ospid: 6485): terminating the instance due to error 445
Instance terminated by USER, pid = 6485


what can i do for this error??