[Samba] 80k+ locked files from single samba user

[Dirk Wartmann]

> Gesendet: Freitag, 18. November 2016 um 12:02 Uhr
> Von: "Dirk Wartmann" <dirk.wartmann at gmx.de>
> An: samba <samba at lists.samba.org>
> Betreff: Aw: Re: [Samba] 80k+ locked files from single samba user
>
> > Gesendet: Donnerstag, 17. November 2016 um 20:47 Uhr
> > Von: "Jeremy Allison via samba" <samba at lists.samba.org>
> > An: "Dirk Wartmann" <dirk.wartmann at gmx.de>
> > Cc: samba <samba at lists.samba.org>
> > Betreff: Re: [Samba] 80k+ locked files from single samba user
> >
> > On Thu, Nov 17, 2016 at 02:26:48PM +0100, Dirk Wartmann via samba wrote:
> > > Hi,
> > > 
> > > our setup succesfully serves 100+ concurrent users for years.
> > > 
> > > beginning a month ago every few days we see single users with 80k+ locked files. Normally all users together only have <5k locked files.
> > > 
> > > This large amount of locked files degrades server performance (too much consumed memory, server beginns swapping).
> > > 
> > > Is there any way i can prevent single users to lock more than for example 500 files?
> > 
> > Better to find the root cause. What changed a month ago ?
> > 
> 
> Nothing changed on the server side, no patches installed etc. 
> 
> As i suspect the clients to trigger the problem, i hope there is a way to strenghten the server against such a denial of service like scenario ...


What would you suggest to do for root cause analysis?