[rrd-users] Re: [mrtg] Pre-generate graphs with MRTG/RRD setup

michael t. anderson lists2 at fadedforce.com
Fri Jun 4 08:19:38 MEST 2004

> -----Original Message-----
> From: rrd-users-bounce at list.ee.ethz.ch 
> [mailto:rrd-users-bounce at list.ee.ethz.ch] On Behalf Of Pavel Ruzicka
> Sent: Thursday, June 03, 2004 2:19 AM
> To: mrtg at list.ee.ethz.ch
> Cc: michael t. anderson; rrd-users at list.ee.ethz.ch
> Subject: [rrd-users] Re: [mrtg] Pre-generate graphs with 
> MRTG/RRD setup
> There are few critical things:
> ----------------------------------
> It's important to use modPERL in Apache.
> There are performance problem, when kernel updates rrdfiles 
> from cache to disk.
> You need enough of RAM for running MRTG and caching of all rrd files.
> On linux you can look for free ram with "top" command. It's 
> better, when swap is not much used. Newer kernels (2.6) have 
> better memory management.
> Other thing is speed of harddrive. One 10000rpm SCSI Ultra320 
> harddrive is enough ;-)

I am using OpenBSD 3.4 with Apache compiled with mod_perl, and have 768MB of
RAM. I am using an IDE hard drive. I have enabled soft updates, which
improves disk performance, but that's about it. I still would like to find a
way to generate the graphs every 5 minutes instead of on the fly with 14all.
I hope that someone can tell me how to do that. 

Thank you.

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