CAJ CAJ wrote: > > > On 3/21/07, *Erik Jones* <erik@xxxxxxxxxx <mailto:erik@xxxxxxxxxx>> wrote: > > > On Mar 21, 2007, at 4:13 PM, Tobias Brox wrote: > >> [Erik Jones - Wed at 09:31:48AM -0500] >>> I use cacti (http://cacti.net) which does the same thing that >>> munin >>> does but in php instead. Here's what I use to db stats to it >>> (again, >>> php): >> >> I haven't tried cacti, but our sysadm has done a little bit of >> research >> and concluded "cacti is better". Maybe some day we'll move over. >> >> Munin is generating all the graphs statically every fifth minute, >> while >> cacti generates them on demand as far as I've understood. The munin >> approach is pretty bloat, since one usually would watch the graphs >> much >> more seldom than what they are generated (at least, we do). >> That's not >> really an argument since CPU is cheap nowadays - but a real >> argument is >> that the munin approach is less flexible. One would like to >> adjust the >> graph (like, min/max values for both axis) while watching quite some >> times. > > Well, by "default", Cacti polls all of the data sources you've set > up every five minutes as well as that's how the docs instruct you to > set up the cron job for the poller. However, with a little > understanding of how the rrdtool rras work, you could definitely > poll more often and simply edit the existing rras and datasources to > expect that or create new ones. And, yes, the graph customization > is pretty cool although for the most part the just map what's > available from the rrdtool graph functionality. If you do decide to > set up Cacti I suggest you go straight to the faq section of the > manual and read the part about going from a simple script to a > graph. The main manual is almost entirely centered on the built-in > networking ( e.g. snmp) data sources and, as such, doesn't do much > for explaining how to set up other data sources. > > > > Has anyone had experience setting up something similar with Nagios? We > monitor servers using nagios and not having to install additional > software (cacti/munin) for postgres resource usage monitoring would be > great. a lot of nagios plugins can supply performance data in addition to the OK/WARNING/CRITICAL state information - there are a number of solutions out there that can take that information and graph it on a per hosts/server base automatically - examples for such addons are nagiosgrapher and n2rrd(or look at www.nagiosexchange.org it has a large number of addons listed). Stefan
