[mrtg] Re: Has anyone used a RAMdisk to speed up MRTG?

Tim Schuh tschuh at verio.net
Thu Jul 8 18:52:44 MEST 1999

Terje Krogdahl wrote:
> "Jim Johnson" <jim at htch.com> writes:
> > Right now I'm monitoring 25 devices.  My Pentium 166 running RH Linux 6.0
> > takes 3:40 (mins:secs) for 3 different instances of MRTG (each polling a 3rd
> > of my devices) to finish running.  If I run all of the targets from just one
> > config (and therefore one instance of MRTG) the run time only goes up to 4
> > mins.
> It seems to me like something causes MRTG to have a looong wait here.
> Have you checked the output from MRTG to see if there's a problem? Maybe
> some targets hold MRTG up?
> I used to do 365 targets (multiple instances) on a Pentium 200 (on IDE
> disks, mind you!) with few problems.

MRTG is very I/O intensive when it's updating the logs. 365 targets on
IDE drives isn't too bad at all.  I guess the question we should be
asking Mr. Johnson is 'How many Targets are you logging with what
kinds of drives?'  The results of /proc/ide/ideX/hdX/<model,cache,settings> 
can be useful here.  


Tim Schuh
Network Systems
Verio Central

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