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

[Achim Gottinger]

Turned Out IT looked good with top. Print Jobs still took a minute to finish. So I solve it the sneaker IT way and upgrade memory. Seems with 4-8GB the servers work fine without swapping. Print Jobs start after 2-3 Seconds again.

Am 10. Oktober 2023 17:00:39 MESZ schrieb Achim Gottinger via samba <samba at lists.samba.org>:
>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~
>>
>>
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