hp oracle 异步IO问题

os : HP-UNIX 11V3
oracle bdump 下产出大量的trace 文件.
$ more  upmondb_ora_28674.trc
/oracle/product/admin/upmondb/bdump/upmondb_ora_28674.trc
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
ORACLE_HOME = /oracle/product/10.2.0
System name:    HP-UX
Node name:      UPITSM2
Release:        B.11.31
Version:        U
Machine:        ia64
Instance name: upmondb
Redo thread mounted by this instance: 1
Oracle process number: 0
Unix process pid: 28674, image: oracle@UPITSM2

Ioctl ASYNC_CONFIG error, errno = 1
$

解决方案：
Grant dba group the MLOCK priv to avoid the Ioctl ASYNC_CONFIG trace file errors:
(1) # /usr/sbin/setprivgrp dba MLOCK
(2) # vi /etc/privgroup,写入下面内容：
dba MLOCK RTSCHED RTPRIO
(3) # cat /etc/privgroup
dba MLOCK RTSCHED RTPRIO
设置了MLOCK系统权限后，故障现象消失。
参考文档
metalink Note:302801.1
相关错误参考文档:http://www.itpub.net/viewthread.php?tid=1005043