[Samba] slow samba

[iLinux]

I have a samba version 3.024 server joined to a ADS as a "Workstation or
server" acting as a file/print server. It is a Debian 4.0 amd64 up to date
with stable. ftp works just fine so not network, must be samba config.

vary slow file transfer when copying file from one computer but copy from
two or more at the same time speed is 10 times faster. You will be copying a
600MG file with one computer and it will say 80 minutes remaining. start
copying a file from a nother computer and 10X faster ( 4 minutes remaining
). Also when copying file from server with linux client 2 minutes 6.5 to 7.0
MBPS.  It looks like it has something to do with cash. i have "winbind cache
time = 30" in my smb.config and "socket options = TCP_NODELAY
SO_RCVBUF=16384 SO_SNDBUF=16384" no help. Thanks in advance for your help.

Ok something new to report. 

file.1 = 3.2G
file.2 = 640M

If I start copying file.1 from server with computer1 i get slow 0.3mbps :(
while computer1 still copying I start copying file.2 from server with
computer2 computer1 speed jumps to normal. and computer2 speed is normal. 
if i cancel computer2's file copy of file.2 computer one speed goes back to
0.3mbps :(

new scenario 
If I start copying file.1 from server with computer1 i get slow 0.3mbps :(
while computer1 still copying I start copying file.1 from server with
computer2 computer1 speed jumps to normal. and computer2 speed is normal. 
if i cancel computer2's file copy of file.1 computer1's speed stays the same
and continues to get faster until full speed :)

If i even touch the same file from a nother computer or even the same
computer that file will copy normal.


*************smb.conf*******************
[global]
        netbios name = SERVERNAME
        workgroup = DOMAIN
        server string = Samba Server
        idmap uid = 10000-20000
        idmap gid = 10000-20000
        winbind enum users = yes
        winbind enum groups = yes
        winbind use default domain = Yes
        winbind nested groups = Yes
        winbind cache time = 300
        winbind separator = +
        password server = *
        preferred master = no
        max log size = 50
        log file = /var/log/samba/log.%m
        log level = 3
        encrypt passwords = true
        dns proxy = no
        realm = SEDGWICK.GOV
        security = ADS
        wins server = 172.xx.xx.xx 172.xx.xx.xx 
        wins proxy = no
        load printers = yes
        printing = cups
        printcap name = cups
        admin users = @"DOMAIN+domain admins",@"DOMAIN+wsadmin"
        template shell = /bin/bash

[share]
        comment = Dept on aging share
        path = /home/samba/share
        browseable = yes
        guest ok = no
        read only = no
        inherit acls = yes
        inherit permissions = yes
        create mask = 700
        directory mask = 700
        vfs object = recycle
        recycle:repository = .recycle/%U
        recycle:keeptree = Yes
        recycle:touch = Yes
        recycle:versions = Yes
        recycle:maxsixe = 0
        recycle:exclude = ~$* *.TMP
        #recycle:exclude_dir = /tmp

[user$]
        comment = Dept  user folders
        path = /home/samba/user
        browseable = yes
        guest ok = no
        read only = no
        inherit acls = yes
        inherit permissions = yes
        create mask = 700
        directory mask = 700
        vfs objects = recycle
        recycle:repository = %U/.recycle
        recycle:keeptree = Yes
        recycle:touch = Yes
        recycle:versions = Yes
        recycle:maxsixe = 0
        recycle:exclude = ~$*
        #recycle:exclude_dir = /tmp

[C$]
        comment = Admin Share
        path = /home/samba
        browseable = yes
        guest ok = yes
        read only = no
        admin users = @"DOMAIN+domain admins",@"DOMAIN+wsadmin"

[printers]
        comment = All Printers
        path = /var/spool/samba
        browseable = yes
        guest ok = yes
        writable = no
        printable = yes

[print$]
        comment = Printer Drivers
        path = /home/samba/drivers
        browseable = yes
        guest ok = no
        read only = no


*************/etc/krb5.conf**************
[libdefaults]
                ticket_lifetime = 24h
                forwardable = yes
                default_realm = DOMAIN.COM
                default_tkt_enctypes = des3-hmac-sha1 des-cbc-crc
                default_tgs_enctypes = des3-hmac-sha1 des-cbc-crc

[realms]
                DOMAIN.COM = {
                        kdc = DOMAIN.COM
                        default_domain = DOMAIN
                }


[domain_realm]
                .domain.com = DOMAIN.COM
                domain.com = DOMAIN.COM

[kdc]
                profile = /etc/krb5kdc/kdc.conf

[logging]
                kdc = FILE:/var/log/krb5kdc.log
                admin_server = FILE:/var/log/kadmin.log
                default = FILE:/var/log/krb5lib.logog
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