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Re: OT: Munin (was Re: Determining server load from client)

From: "CAJ CAJ" <pguser(at)gmail(dot)com>
To: "Erik Jones" <erik(at)myemma(dot)com>
Cc: "Tobias Brox" <tobias(at)nordicbet(dot)com>, "Richard Huxton" <dev(at)archonet(dot)com>, "Joe Healy" <joe(at)omc-international(dot)com(dot)au>, "Dan Harris" <fbsd(at)drivefaster(dot)net>, "PostgreSQL Performance" <pgsql-performance(at)postgresql(dot)org>
Subject: Re: OT: Munin (was Re: Determining server load from client)
Date: 2007-03-25 05:46:17
Message-ID: 467669b30703242246gfac2ff5h66b5723d923520f0@mail.gmail.com (view raw or flat)
Thread:
Lists: pgsql-performance
On 3/21/07, Erik Jones <erik(at)myemma(dot)com> 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.

Thanks in advance!

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