SAMBA 2.2.2 - slow print queue update

[Klaus Jungbauer]

Gerald Carter wrote:
> 
> On Thu, 24 Jan 2002, Klaus Jungbauer wrote:
> 
> > a customer of us asked me to analyse the performance problems at his
> > Samba 2.2.2 (Solaris 8) print server (E250 single CPU, 1GB Mem).
> >
> > The first issue is a huge amount of 390 (!) network printers to serve.
> 
> That is a lot. :-)

printers, not queues ...

> > Using the new SpoolSS feature, he needs printer driver download
> > support, we found problems using the printer folder below server view,
> > as it needs an inacceptable time to get the result (some minutes and
> > server CPU at 100%).  Some times it looks like a timeout will be
> > reached and the client may freeze. Same behavior can be seen while
> > viewing properties of a printer.
> >
> > Looking into source and using smbd debug level 3 shows, that most time
> > would be used at printing/printing.c->print_queue_status. truss shows,
> > the most time will be consumed by a very hugh amount of fcntl() system
> > calls.
> 
> But up the lpq cache time to something larger than 10 seconds.
> Maybe 60?

I tried values from 60 to 600 seconds, but that won't solve. The
performance 'boost' is less than 5 seconds.

> > As i could see in source the smbd have to do update the print queue
> > status by itself. That would be fine for only a few printers, but gets
> > very complex for a greater amount of printers.
> >
> > Are there any ideas to update print queue status in a more efficient
> > way, e.g. a dedicated process/thread?
> 
> Yeah.  This is on the TODO list.  JF had a stab at it initially.
> Not done yet.

When may it be testable? 
I would have a good platform to do :-)

-- 

Regards

--------------------------------
CLASS AG - http://www.class.de

Klaus Jungbauer
Senior Systems Engineer
Projects
Tel   +49 (0) 8151/991-241
mobil +49 (0) 172/82 130 25
mailto:Klaus.Jungbauer at class.de