nate wrote: >> > I wrote a few scripts that get CPU usage and feed it into SNMP for > retrieval for my cacti systems. > > My company used to rely on the built in linux SNMP stuff for cpu > usage(before I was hired) and they complained how it always seemed > to max out at 50%(on a dual cpu system). > > I've been using my own methods of CPU usage extraction using sar > for about 6 years now and it works great, only downside is sar > keeps being re-written and with every revision they make it harder > and harder to parse it(RHEL 3 was the easiest by far). > > Sample graph - > http://portal.aphroland.org/~aphro/cacti-cpu.png > > That particular cacti server is collecting roughly 20 million data > points daily(14,500/minute). *Heavily* customized for higher > scalability. Have you looked at OpenNMS for this? It's java with a postgresql backend for some data and jrobin (equivalent to rrd) for some. It needs a lot of RAM and has the same i/o bottleneck as anything else updating large numbers of rrd files but otherwise is pretty scalable and includes a lot more features than cacti. -- Les Mikesell lesmikesell at gmail.com
