memory leaks in dreplsrv
abartlet at samba.org
Tue Aug 14 23:12:25 UTC 2018
On Fri, 2018-08-03 at 09:15 +0200, Andrej Gessel via samba-technical
> Hello list,
> I found some more mem leaks, that I missed last time.
> Please review.
> PS: I'm searching for mem leaks, because dreplsrv on RODC with samba
> 4.8.3 was killed because of oom, so I'm trying to fogure out where
> memory is lost and why it's happening.
A few hints:
- smbcontrol can get a talloc dump from a process
- If the memory is not leaked, but instead just touched, it can show
up as a large process. The classic example is a full DB search against
the LDAP server, with the socket left open. This is because in unix,
free() does not return memory to the kernel, it remains in the process
- While I've not tested this on Samba, I would try a flame graph:
- Try and reproduce the issue in 'samba-tool drs replicate --local' as
that will be easier to trace and debug, as it will all be in that
Thanks for all your attention on this!
Authentication Developer, Samba Team https://samba.org
Samba Development and Support, Catalyst IT
More information about the samba-technical