On Fri, Dec 4, 2009 at 10:35 AM, Cassandra Pugh <[email protected]> wrote: > Hello, > > I have ganglia 3.1.2 running on RHEL 32bit. > > I have often noticed that the graphs have gaps in them, and am asking for > help on how to eliminate these gaps. > > If I happen to access the ganglia page while a gap is occuring, it shows > that everything is down. After a while everything is back online, but there > is no ramp up or down in the graph like there is upon restart or reload of > ganglia. It simply has data... blank .. data. > > I am monitoring 1630 nodes. > So, I thought that perhaps it was getting overburdened at times from all the > traffic. However I am using a very beefy machine, and do not see high cpu > or memory usage even during these gaps. Also the network folks don't see > any abnormally large traffic on the network. > > I have tried to increase the send_metadata_interval and the polling > interval , but I still see gaps. > > Any ideas? >
i had this happen on 4-500 node cluster that was collecting fine for months. my setup is unicast not multicast. i quickly found that gmetad couldn't reliably pull the xml tree from the gmond collectors fast enough. it turned out that our alerts for router interface's weren't working and we were experiencing serious packet loss during peak traffic times. try telnetting gmond's tcp listen port and check the xml tree for any hosts with gaps, check their last update time too. > Thanks! > -- > Cassandra > (609) 243-2413 > Unix Administrator > > > "From a little spark may burst a mighty flame." > -Dante Alighieri > > > ------------------------------------------------------------------------------ > Join us December 9, 2009 for the Red Hat Virtual Experience, > a free event focused on virtualization and cloud computing. > Attend in-depth sessions from your desk. Your couch. Anywhere. > http://p.sf.net/sfu/redhat-sfdev2dev > _______________________________________________ > Ganglia-general mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/ganglia-general > > ------------------------------------------------------------------------------ Join us December 9, 2009 for the Red Hat Virtual Experience, a free event focused on virtualization and cloud computing. Attend in-depth sessions from your desk. Your couch. Anywhere. http://p.sf.net/sfu/redhat-sfdev2dev _______________________________________________ Ganglia-general mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/ganglia-general
