[Samba] Slow Samba AD DC performance compared to Microsoft AD DC

[Sinan Ozturk]

Hello everyone.

I have a problem with performance of Samba AD DC.

We have a Laravel application that queries both Microsoft AD DC and Samba AD DC.

When a query comes to AD it takes 1 second to complete, however with Samba it can take up to 4-5 seconds.

The queries are updating user, creating group and attaching people to groups.

Samba Server has more than 6000 users.

The VM has 2 CPU 2 GB Ram and Virtio network card running Ubuntu 14.04 with Samba 4.3.11.

Is there any way I can speed up Samba server?

Here is the smb.conf file

###########################################################
# Global parameters
[global]
        workgroup = domain
        realm = domain.COM
        netbios name = JUGGERNAUT
        server role = active directory domain controller
        dns forwarder = 172.31.238.11
        idmap_ldb:use rfc2307 = yes
        log level = 1
        ldap ssl = off
        ldap server require strong auth = no
[netlogon]
        path = /var/lib/samba/sysvol/domain.com/scripts
        read only = No

[sysvol]
        path = /var/lib/samba/sysvol
        read only = No

###########################################################

Thanks.