help in need

["Xiong Zhao" <xz@gatekeeper.ncic.ac.cn>]

hello,now i encounter a problem after installing RedHat linux2.2.16	with SMP kernel
on a Dell PowerEdge machine(4CPU).i can only see about 900M memory available using 
top command or in /proc/meminfo file,but actually there are 4G physical memory on the
machine.However if i launch with the enterprice kernel,the total 4G memory can be seen.
How does this happen?Is this a limit for this version?How can i resolve it?
must i upgrade the kernel(to what version)?In addition,when i run Lotus Domino on the 
machine(with either kernel),there will always occur port listening error after the 
estblished TCP connections go up to 4 or 5 hundred and say too many files have been opened.
But everything goes well when i do the same test on AIX. Why? Is there a limit of the number
of processes that a single process can fork and of the files a process can open? If so,
how can i set it to a larger value?Any suggestion will be helpful,and i'm waiting for 
your reply eagerly.


                                               xiong zhao

-
Linux-mm-bugs:  bugzilla list for the Linux-MM subsystem
Archive:        http://mail.nl.linux.org/linux-mm-bugs/
Web site:       http://www.linux.eu.org/Linux-MM/
Development:    linux-mm@kvack.org