[Samba] Is it possible to reduce the number of workers for rpcd_winreg?

[Achim Gottinger]

As recommended by Volker Lendecke I added the option.

rpcd_winreg:idle_seconds = 5 Now on 2GB Servers swapping is avoided and on 1Gb Servers the server goes back to normal in ~5 seconds after the logon process has finished.

Am 10.10.2023 um 13:58 schrieb Achim Gottinger via samba:

> Dear Samba Group,
>
> I recently updates our samba addc's to 4.18.6 (from 4.7.7). We use roaming profile and a login script which queries active shares and printers on the logon servers. Since the update i see a lot of
> rpcd_winreg processes if an user logs on. It are around 40 of these processes each consuming around 60MB. The servers have 1-2GB of ram assigned so they start swapping everytime an user logs on. The
> processes disappear after 1-2 Minutes and the free memory goes back from 50MB to ~1.2GB (on an 2GB server).
> Is there a way to limit the number of workers so i can avoid swapping?
> So far i found "prefork backoff increment", "prefork children" and "prefork maximum backoff" variables which are related to the workers but these are not helpful in my case.
>
> The operating system is debian bookworm.
>
> smb.conf
>
> [global]
>         workgroup = DOMAIN
>         realm = domain.loc
>         netbios name = SERVER
>
>         logging = syslog
>         log level = 0
>
>         usershare path =
>
>         interfaces = 192.168.0.1 127.0.0.1
>         bind interfaces only = yes
>
>         server role = active directory domain controller
>         dns forwarder = 192.168.0.200
>
>         idmap_ldb:use rfc2307 = yes
>         idmap config * : range = 3000000-4000000
>         ldap server require strong auth = no
>         kccsrv:samba_kcc = no
>         deadtime = 10
>
> .......
>
>
> Thanks in advance,
> Achim~
>
>