[mrtg] Re: MRTG scaling and performace issues ?

[Aivo Kalu]

> -----Original Message-----
> From:	David C Prall [SMTP:dcp at dcptech.com]
> Sent:	19. oktoober 1999. A. 14:48
> To:	mrtg at list.ee.ethz.ch
> Subject:	[mrtg] Re: MRTG scaling and performace issues ? 
> 
> > > I'm running mrtg 2.8.8. on a RedHat Linux 6.0, on a 200 Mhz Pentium,
> 96 MB
> > > memory. I have about 56 configuration files, with about 500 targets.
> Most
> > > targets are on our LAN, I'm monitoring the traffic and error rates
> of our
> > > switches. However, the machine cannot keep up with 5 minutes period
> and I
> > > need to add several more targets into my base. So, this makes me
> quite
> > > worrying.
> > >
> > > I did a search in a mailing lists archive and found some
> recommendations
> > > for tweaking hard disk performance and switching over to another
> tool.
> > > Regarding the hard disk, I ran hdparm and gained about one third of
> > > throughput, but it didn't helped too much. When it comes to
> switching the
> > > statistics tool, I'm not too keen on it.
> > >
> > > So, have anybody ran into similar problems and maybe have some
> > > recommendations, what should I do. Put a brand new 500 Mhz machine
> into
> > > place ? Melt configuration files into one single piece ? Run mrtg in
> mode,
> > > in which the gif files aren't generated every time ?
> > >
> How are you running these 56 configuration files. You should be able to
> kick all of them off at the same time, or setup 10 scripts with each
> running 5 or 6 of them sequentially. SNMP queries shouldn't take up that
> much bandwidth, so you should be able to running a very large number of
> queries all at the same time.
[Aivo Kalu]  
Thanks for the tip, but it seems that 96 MB memory isn't enough for me.
Machine ended up swapping when I kicked all them in parallel. I will try to
run fewer of them in parallel. 

Can I run mrtg in a mode that when it ends with one configuration file, the
same instance of mrtg starts working on another configuration file ? Could
it be achieved simply cat-ing different configuration files together and
feeding them to a one mrtg or does the different "Working Directory"
commands make it impossible ? 

In that way, all the perl loading and starting would be eliminated and in my
humble opinion a little more performance would be gained. 

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