samba - May 2013 - Performance is limited by design on larger servers?

I have a fairly large server with 16 CPU, 8 Gb ram and just four HDD's.
While the disks are pretty untouched most of the time, three samba
processes are working for dear life. Sometimes going up to 100. These
processes are running LDAP, SMB and Kerberos where LDAP seem to be the one
mostly utilized.

If i could spread the load onto more processes this server would be able to
handle a lot more requests. Is there any way to do this?

//danileh
-- 
With best regards,
Daniel Hedblom
Sysadmin
Department Barn och Skolf?rvaltningen
Municipality of Sollefte?
Phone: +46 (0) 620-68 22 02
Mobile: + 46 (0) 70 383 72 44