[Samba] High cpu load on LDAP

[Douglas Bagnall]

On 17/02/25 21:08, Heinz Hölzl via samba wrote:
> hi,
> 
> For the moment, it looks like the problem has been solved.
> 
> I am now using LMDB back end and it is much more performant.

That is good to hear, and interesting. I would have expected it to make 
some difference but not completely fix the problem (given that Samba is 
necessarily slow outside the key/value layer).
> P.s. LMDB does not work with btrfs as underlying filesystem.
> 
> Perhaps this could be noted in the documentation?
> https://wiki.samba.org/index.php/Using_the_lmdb_database_backend

My understanding is this was fixed upstream in the Linux kernel 
somewhere around commit b73a6fd1b1efd799c6e3d14a922887f4453fea17 (~ 
March 2023). I might be wrong, and I have no clue whether or when this 
will end up in stable/distro kernels.

I have CC'd Andreas who chased this down with 
https://bugzilla.redhat.com/show_bug.cgi?id=2169947.

Douglas