[Samba] Ram saturation problem

[Rémi PAETA]

Hello everybody,

I am contacting you because I am having a problem with one of my 3 
domain controllers.
I am having a problem with processes that keep adding up and eventually 
fill up the RAM memory .
I can't find anything in the logs that would allow me to determine why.
Here is an example:
(extract from htop)

1162 root       20   0 1031M 51084 25688 S  0.0  0.8  3:50.59 │  ├─ 
samba: task[dcesrv]
  2607 root       20   0 1031M 47532 22136 S  0.0  0.8  0:00.07 │  │  ├─ 
samba: conn[named_pipe] c[unix:] 
s[unix:/var/run/samba/ncalrpc/np/netlogon] server_id[2607]
  2481 root       20   0 1031M 44816 19420 S  0.0  0.7  0:00.05 │  │  ├─ 
samba: conn[named_pipe] c[unix:] 
s[unix:/var/run/samba/ncalrpc/np/netlogon] server_id[2481]
  2476 root       20   0 1031M 52648 27252 S  0.0  0.9  0:00.03 │  │  ├─ 
samba: conn[named_pipe] c[unix:] 
s[unix:/var/run/samba/ncalrpc/np/netlogon] server_id[2476]
  2475 root       20   0 1031M 52648 27252 S  0.0  0.9  0:00.03 │  │  ├─ 
samba: conn[named_pipe] c[unix:] 
s[unix:/var/run/samba/ncalrpc/np/netlogon] server_id[2475]
  2444 root       20   0 1031M 50732 25336 S  0.0  0.8  0:00.06 │  │  ├─ 
samba: conn[named_pipe] c[unix:] 
s[unix:/var/run/samba/ncalrpc/np/netlogon] server_id[2444]
  2429 root       20   0 1031M 52648 27252 S  0.0  0.9  0:00.03 │  │  ├─ 
samba: conn[named_pipe] c[unix:] 
s[unix:/var/run/samba/ncalrpc/np/netlogon] server_id[2429]
  2428 root       20   0 1031M 52648 27252 S  0.0  0.9  0:00.03 │  │  ├─ 
samba: conn[named_pipe] c[unix:] 
s[unix:/var/run/samba/ncalrpc/np/netlogon] server_id[2428]
  1872 root       20   0 1031M 49448 24052 S  0.0  0.8  0:00.03 │  │  ├─ 
samba: conn[named_pipe] c[unix:] 
s[unix:/var/run/samba/ncalrpc/np/netlogon] server_id[1872]
  1843 root       20   0 1031M 50732 25336 S  0.0  0.8  0:00.04 │  │  ├─ 
samba: conn[named_pipe] c[unix:] 
s[unix:/var/run/samba/ncalrpc/np/netlogon] server_id[1843]
  1812 root       20   0 1031M 52648 27252 S  0.0  0.9  0:00.04 │  │  ├─ 
samba: conn[named_pipe] c[unix:] 
s[unix:/var/run/samba/ncalrpc/np/netlogon] server_id[1812]
  1811 root       20   0 1031M 52648 27252 S  0.0  0.9  0:00.04 │  │  ├─ 
samba: conn[named_pipe] c[unix:] 
s[unix:/var/run/samba/ncalrpc/np/netlogon] server_id[1811]
  1608 root       20   0 1031M 53996 28600 S  0.0  0.9  0:00.04 │  │  ├─ 
samba: conn[named_pipe] c[unix:] 
s[unix:/var/run/samba/ncalrpc/np/netlogon] server_id[1608]               
                                             551 root       20   0 1031M 
51088 25692 S  0.0  0.8  0:00.09 │  │  └─ samba: conn[named_pipe] 
c[unix:] s[unix:/var/run/samba/ncalrpc/np/netlogon] server_id[551]

I use Samba 4.10.17 on Debian Stretch
Do you have any idea where the problem may be coming from please?

Thank you for your help :-)