[Samba] High RAM consumption

[Dinar Yulm]

> detail such as the Samba version

$ git show
commit 8209a1035d362673a87bccc9264efce05402a2f2 (HEAD, tag: samba-4.20.4,
origin/v4-20-stable)
...
$ lsb_release -d
Description:    Debian GNU/Linux 12 (bookworm)

> what kind of database ldb is using (tdb or lmdb)

lmdb

> the size of the domain, the number of active users
> Do you know why your database is 4GB?

We have connected Samba to a very large Windows domain. It has more than
15,000 users and computers. Users have a lot of additional data and
settings.

I repeated the problem on the test domain and servers with the minimum
necessary (generated) data.
Next, I described how to get the same configuration of the Samba controller,
see the attached file.

These are links to videos demonstrating the problem:
https://drive.google.com/drive/folders/10Eyt5vQFExOhUJ3RFNGnOSXnKMM4Cn4u?usp=drive_link

ср, 28 авг. 2024 г. в 06:12, Douglas Bagnall <
douglas.bagnall at catalyst.net.nz>:

> On 22/08/24 19:26, Dinar Yulm via samba wrote:
> > Hello,
> >
> > LDAP Samba processes consume a lot of memory. Each LDAP process loads the
> > entire ldb database into memory and does not release it over time. For
> > example, for a 4GB ldb database and 4 LDAP processes, Samba will use up
> > more than 16 GB of RAM. If only 16GB of RAM is installed on the server,
> > then Samba will respond to requests with long delays. Some requests will
> not
> > be answered (by time-out).
>
> This is not expected.
>
> It is hard to say what the problem is without detail such as the Samba
> version, what kind of database ldb is using (tdb or lmdb), the size of
> the domain, the number of active users, and the extent to which memory
> usage gets worse over time.
>
> Do you know why your database is 4GB?
>
> Douglas
>