[Samba] samba AD DC eats memory

[Andrew Bartlett]

On Wed, 2020-03-04 at 19:13 +0300, Alex via samba wrote:
> Hello Andrew,
> 
> > I've got a fix for one issue seen here.
> > BUG: https://bugzilla.samba.org/show_bug.cgi?id=14299
> > MR: https://gitlab.com/samba-team/samba/-/merge_requests/1168
> 
> Yesteray, I've deployed freshly released 4.12.0 and it still eats
> memory:
> 
> top - 18:59:10 up 1 day, 25 min,  1 user,  load average: 0.08, 0.13,
> 0.10
> Tasks: 176 total,   1 running, 175 sleeping,   0 stopped,   0 zombie
> %Cpu(s):  0.2 us,  0.0 sy,  0.0 ni, 99.8 id,  0.0 wa,  0.0 hi,  0.0
> si,  0.0 st
> MiB Mem :   1829.4 total,    198.7 free,   1229.6 used,    401.1
> buff/cache
> MiB Swap:   1536.0 total,   1508.2 free,     27.8 used.    392.4
> avail Mem
> 
> Right after samba started, it took around 500MB of "used".
> 
> The OS is CentOS 8.
> # uname -r
> 4.18.0-147.5.1.el8_1.x86_64
> 
> smem output: https://paste.ee/p/W9hO9
> samba-tool processes: https://paste.ee/p/OGoav
> smbcontrol pool-usage for most memory-consuming processes: 
> https://www.dropbox.com/s/ll1iwbzumafdmah/smbcontrol.pool-usage.tgz?dl=0
> 
> Anything I can do to help troubleshoot it further?

Thanks.  This shows that the particular fix I made is correct, but that
the main issue (which is duplicate schema loading) is, as expected, not
yet addressed.  

I've been quite busy chasing a number of other community issues and
won't have time to investigate this further until at least next week.

Sorry!

Andrew Bartlett

-- 
Andrew Bartlett
https://samba.org/~abartlet/
Authentication Developer, Samba Team         https://samba.org
Samba Development and Support, Catalyst IT - Expert Open Source
Solutions
https://catalyst.net.nz/services/samba