Oh yes - setting deaf=yes is the solution - I mentioned that in my first email (sorry that I was not very clear about that).
My question however was - is that a bug or a feature? It can be tricky
as in default configuration deaf=no and one could not simply get to the
source of problem. In "Monitoring with Ganglia" book hovewer it is
mentioned (page 22) in the picture that gmond nodes are deaf; but maybe
(just maybe) gmond could not listen to anything if it has no
recv_channels defined? :)
>
> On 02/07/2014 09:59 AM, Maciej Lasyk wrote:
> >Sure, it's not that long so I'm posting it in-place:
> >
> >globals {
> > daemonize = yes
> > setuid = yes
> > user = ganglia
> > debug_level = 0
> > max_udp_msg_len = 1472
> > mute = no
> > deaf = no
> > allow_extra_data = yes
> > host_dmax = 0 /*secs */
> > cleanup_threshold = 300 /*secs */
> > gexec = no
> > send_metadata_interval = 60 /*secs */
> >}
> >
> >cluster {
> > name = "somecluster"
> > owner = "someowner"
> > latlong = "unspecified"
> > url = "unspecified"
> >}
> >
> >host {
> > location = "host"
> >}
> >
> >udp_send_channel {
> > bind_hostname = yes
> > port = 8649
> > ttl = 2
> > host = 192.168.1.23
> >}
> >
> >.. and here go modules / metrics
> >
> >On Fri, Feb 07, 2014 at 09:15:56AM -0500, Vladimir Vuksan wrote:
> >> Maciej,
> >>
> >> can you post top 100 lines or so of your config ie. with all the udp
> >> channels etc.
> >>
> >> Thanks
> >>
> >> On 02/07/2014 08:52 AM, Maciej Lasyk wrote:
> >>
> >> Hi guys,
> >>
> >> I've been struggling with very high cpu usage of my gmond daemons
> >> lately. I've been using UDP unicast topology. I just couldn't find the
> >> source of my problem. All my gmonds on my servers were generating
> >> ~99-100% of procs usage.
> >>
> >> stracing gmond processes revealed zounds of epools and gettimeofdays
> >> syscalls (like very many every second) and that was all.
> >>
> >> I tried to start from scratch - there was no problem when using default
> >> config (mutlicast topo, deaf/mute=no). So after playing a while I
> >> thought that _maybe_ deaf=no on gmond which is only sending data to some
> >> aggregator (only udp_send_channel, no rcv channels or tcp channels)
> >> generates some negative energy here. And that was it.
> >>
> >> My mistake was that I thought that when deaf=no is set than it doesn't
> >> matter as in UDP unicast we just don't listen - unless we have
> >> recv_channel configured.
> >>
> >> So I think that this could be a bug - not a feature. What's your
> >> thoughts on this?
> >>
> >>
> >> ------------------------------------------------------------------------------
> >> Managing the Performance of Cloud-Based Applications
> >> Take advantage of what the Cloud has to offer - Avoid Common Pitfalls.
> >> Read the Whitepaper.
> >>
> >> [1]http://pubads.g.doubleclick.net/gampad/clk?id=121051231&iu=/4140/ostg.clktrk
> >>
> >> _______________________________________________
> >> Ganglia-developers mailing list
> >> [2]Ganglia-developers@lists.sourceforge.net
> >> [3]https://lists.sourceforge.net/lists/listinfo/ganglia-developers
> >>
> >>References
> >>
> >> Visible links
> >> 1.
> >> http://pubads.g.doubleclick.net/gampad/clk?id=121051231&iu=/4140/ostg.clktrk
> >> 2. mailto:Ganglia-developers@lists.sourceforge.net
> >> 3. https://lists.sourceforge.net/lists/listinfo/ganglia-developers
> >>/usr/bin/xdg-open: line 402: htmlview: command not found
> >>/usr/bin/xdg-open: line 402: firefox: command not found
> >>/usr/bin/xdg-open: line 402: mozilla: command not found
> >>/usr/bin/xdg-open: line 402: netscape: command not found
>
--
--
pozdrawiam,
Maciej Lasyk
GPG key ID: FFA8AEEC
GPG info: http://maciek.lasyk.info/gpg.txt
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