[rrd-users] Re: Performance problem in RRDp.pm

[Tobias Oetiker]

Today you sent me mail regarding Re: [rrd-users] Performance problem in RRDp.pm:

*> Tobias Oetiker wrote:
*> > *> I hope this is the right place to ask.
*> > *> 
*> > *> I have hacked rrdtool into MRTG for normal operation (ie. for batch
*> > *> generation of graphs). This seems to work relatively ok now, but it
*> > *> is not by far as fast as I had hoped.
*> > 
*> > I would not use RRDp but RRDs ...
*> 
*> So would I. :) Problem is that it does not work for me:
*> 
*> ld.so.1: /local/bin/perl5.004: fatal: relocation error: file \
*> /lib/auto/RRDs/RRDs.so: symbol newRV_noinc: referenced symbol not found

I guess the perl you are using is not the same perl that was used when
compiling RRDs ... I also suggest to upgrade to perl 5.005_3

cheers
tobi

*> > what happens when you run the performance test
*> > in the example directory, howmany updates do you see?
*> 
*> Updates? The example config file has 86 targets. That should be 344
*> graphs.

updates per second ... 86 targets should be no problem ... 
*> 
*> > another point is that two things are mortal for the performance of rrdtool
*> > 
*> > b) not enough memmory on the server ... you will observe that once you
*> >    increasse the number of rrd files performance will drop by one order of
*> >    magnitude at a certain number of rrd files ... this is a function of
*> >    the number of rrd files
*> 
*> I think this might be a problem. The box only has 384MB memory, and it
*> currently uses 283MB swap space. Maybe I should just get a bigger iron
*> for this job.

note its not the CPU its only the memmory ... 

*> Thank you for your help! I will see to it that we add a post for CD's
*> in the 2000 budget. :)

:-) 

cheers
tobi
*> 
*> 
*> Cheers, Bjørn
*> 

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