求教POSIX消息队列的问题

[gxpb@localhost ~]$ ulimit -a
core file size (blocks, -c) 0
data seg size (kbytes, -d) unlimited
file size (blocks, -f) unlimited
pending signals (-i) 1024
max locked memory (kbytes, -l) 32
max memory size (kbytes, -m) unlimited
open files (-n) 1024
pipe size (512 bytes, -p) 8
POSIX message queues (bytes, -q) 819200
stack size (kbytes, -s) 10240
cpu time (seconds, -t) unlimited
max user processes (-u) 8192
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited


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其中
POSIX message queues (bytes, -q) 819200
这个值如何调整？
因为程序不能运行在root 权限， 所以需要一种方法能够永久更改某个普通用户的这个限制值

急求

http://hi.baidu.com/grdd/blog/item/fe15db09b0b0ab91d1581baa.html

kernel.msgmnb