[rrd-users] rrdtool backed mrtg using massive amounts of memory

Steven Hartland killing at multiplay.co.uk
Wed May 20 00:49:51 CEST 2009

Of course always helps if you attach the files :P

----- Original Message ----- 
From: "Steven Hartland" <killing at multiplay.co.uk>

> It just happened again so attached some info from the log and truss which
> may give someone an idea where the issue is.
> A few more things which may be useful:
> rrd isnt big:-
> du -h as01.gswams_11.rrd
> 2.8M    as01.gswams_11.rrd
> rrdtool config info:
> It was created by rrdtool configure 1.3.7, which was
> generated by GNU Autoconf 2.61.  Invocation command line was
>  $ 
> ./configure --disable-tcl --disable-python --disable-ruby --enable-perl --enable-perl-site-install --disable-mmap --prefix=/usr/local 
>  --mandir=/usr/local/man --infodir=/usr/local/info/ --build=amd64-portbld-freebsd7.0
> So the log clearly shows mmap in use, for the update to the rrd that
> caused the issue, but not for the next or any subsiquent files, but this
> build was definitely compiled with --disable-mmap as shown by config.log.
> Next up, as far as I can see rrdtool doesnt even use MAP_ANON so whats
> causing this strange behviour?

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