[Samba] Problem with MAX OPEN FILES REACHED

[vk]

I am using CALDERA OPENLINUX 3.1.1 with latest patches and Samba 2.2.5 on it. 
But recently I start to receive linux error "kernel: VFS MAX FILES REACHED" 
and Samba error "Too many open files". After it I tuning linux increase open 
files descriptors in
/etc/security/limits.conf 
*               soft    nproc   4094
*               hard    nproc   16384
*               soft    nofile  12000
*               hard    nofile  16000
, /etc/rc.d/init.d/samba ulimit -n 12000 before start smbd, /etc/sysctl.conf 
fs.file-max = 12000 
And start monitoring through lsof, smbstatus every 15 min.
In a few days situation with halt limits repeat and monitiring to show (I do 
not show full logs because it's very big. Only sessions which lead to 
Errors.):
######################################################## 
START-TIME =26.01.2007 09:00 

OpenFiles FULL 
1171 

OpenFiles by SMB 
861 
######################################################## 
START-TIME =26.01.2007 09:15 

OpenFiles FULL 
12179 

OpenFiles by SMB 
11860 

smbstatus 
Samba version 2.2.5 
Service uid gid pid machine 
---------------------------------------------- 
itconstr nobody nobody 27615 constr7 (10.0.1.66) Fri Jan 26  2007 
doxbuh nobody nobody 27615 constr7 (10.0.1.66) Fri Jan 26  2007 

27615 DENY_NONE 0x2019f RDWR NONE /pub/constr0/drawing/текстовые 
документы/бланк листа.тодак.doc Fri Jan 26 0915 2007 

(At first sight everything is all right while don't look at lsof monitor log 
file)

smbd 27615 root cwd DIR 8,17 4096 3424304 /pub/constr0/drawing 
smbd 27615 root rtd DIR 8,1 1024 2 / 
smbd 27615 root txt REG 8,1 1718203 22692 /usr/sbin/smbd 
smbd 27615 root mem REG 8,1 102069 22499 /lib/ld-2.2.4.so 
smbd 27615 root mem-r REG 8,1 8192 
112879 /usr/local/samba/private/secrets.tdb 
smbd 27615 root mem-r REG 8,1 696 
69685 /usr/local/samba/var/locks/messages.tdb 
smbd 27615 root mem-r REG 8,1 8192 
69697 /usr/local/samba/var/locks/brlock.tdb 
smbd 27615 root mem-r REG 8,1 8192 
69692 /usr/local/samba/var/locks/printing.tdb 
smbd 27615 root mem-r REG 8,1 8192 
69693 /usr/local/samba/var/locks/ntdrivers.tdb 
smbd 27615 root mem-r REG 8,1 696 
69695 /usr/local/samba/var/locks/ntforms.tdb 
smbd 27615 root mem REG 8,1 14831 22540 /lib/libdl-2.2.4.so 
smbd 27615 root mem REG 8,1 92218 22542 /lib/libnsl-2.2.4.so 
smbd 27615 root mem REG 8,1 26599 22503 /lib/libcrypt-2.2.4.so 
smbd 27615 root mem REG 8,1 1459437 22500 /lib/libc-2.2.4.so 
smbd 27615 root mem-r REG 8,1 8192 
69694 /usr/local/samba/var/locks/ntprinters.tdb 
smbd 27615 root mem-r REG 8,1 8192 
69696 /usr/local/samba/var/locks/share_info.tdb 
smbd 27615 root mem-r REG 8,1 32768 
69686 /usr/local/samba/var/locks/connections.tdb 
smbd 27615 root mem REG 8,1 54338 22543 /lib/libnss_compat-2.2.4.so 
smbd 27615 root mem-r REG 8,1 49152 
69691 /usr/local/samba/var/locks/locking.tdb 
smbd 27615 root 0u CHR 1,3 12379 /dev/null 
smbd 27615 root 1u CHR 1,3 12379 /dev/null 
smbd 27615 root 2u CHR 1,3 12379 /dev/null 
smbd 27615 root 3r CHR 1,9 12805 /dev/urandom 
smbd 27615 root 4ur REG 8,1 8192 112879 /usr/local/samba/private/secrets.tdb 
smbd 27615 root 5u IPv4 7311908 TCP it1.todak:netbios-ssn->constr7.todak:1028 
(ESTABLISHED) 
smbd 27615 root 6w REG 8,1 20 69684 /usr/local/samba/var/locks/smbd.pid 
smbd 27615 root 7ur REG 8,1 696 69685 /usr/local/samba/var/locks/messages.tdb 
smbd 27615 root 8ur REG 8,1 32768 
69686 /usr/local/samba/var/locks/connections.tdb 
smbd 27615 root 9ur REG 8,1 8192 69697 /usr/local/samba/var/locks/brlock.tdb 
smbd 27615 root 10r FIFO 0,5 7165965 pipe 
smbd 27615 root 11w FIFO 0,5 7165965 pipe 
smbd 27615 root 12u IPv4 7311909 UDP localhost:33081 
smbd 27615 root 13ur REG 8,1 49152 
69691 /usr/local/samba/var/locks/locking.tdb 
smbd 27615 root 14ur REG 8,1 8192 
69692 /usr/local/samba/var/locks/printing.tdb 
smbd 27615 root 15ur REG 8,1 8192 
69693 /usr/local/samba/var/locks/ntdrivers.tdb 
smbd 27615 root 16ur REG 8,1 8192 
69694 /usr/local/samba/var/locks/ntprinters.tdb 
smbd 27615 root 17ur REG 8,1 696 69695 /usr/local/samba/var/locks/ntforms.tdb 
smbd 27615 root 18ur REG 8,1 8192 
69696 /usr/local/samba/var/locks/share_info.tdb 
smbd 27615 root 19r DIR 8,17 4096 3424304 /pub/constr0/drawing 
smbd 27615 root 20r FIFO 0,5 7311910 pipe 
smbd 27615 root 21w FIFO 0,5 7311910 pipe 
smbd 27615 root 22rw REG 8,17 360448 
8634387 /pub/constr0/drawing/xd4xc5xcbxd3xd4xcfxd7xd9xc5 
xc4xcfxcbxd5xcdxc5xcexd4xd9/xc2xccxc1xcexcb 
xccxc9xd3xd4xc1.xd4xcfxc4xc1xcb.doc 
smbd 27615 root 23r DIR 8,17 4096 
8634476 /pub/constr0/drawing/xd4xc5xcbxd3xd4xcfxd7xd9xc5 
xc4xcfxcbxd5xcdxc5xcexd4xd9 

( last message repeat about 11800 times )

================================================
Can you explain me why samba open one file so a lot of times?
And how can I admin this process, restrict or limit open files in one session?
May be you have any other method or advice.

Please HELP HELP HELP my.