Last year I experimented with both the PHP and Python Ganglia Nagios plugins. I ran into performance problems with both - granted I was trying to run Nagios and Ganglia together on 1 VM with 2x 2.4 GHz cores for ~650 hosts and ~5000 services.
I modified the Python plugin to cache results from gmetad and that provided a significant speedup, but the sheer volume of interpreter instances became the big slowdown. I rewrote the plugin in C and saw a significant reduction in kernel-time overhead. If anyone else is interested or may find use from the plugin, I've finally been cleared to release it: https://github.com/RPI-HPC/check_ganglia_metric I hope at some point to make the Python plugin caching changes available as well. The caching could likely be improved to be less metadata-intensive or possible in-memory but unfortunately I don't have the time to do that right now. Regards, -- Daniel M. Weeks Systems Programmer Center for Computational Innovations Rensselaer Polytechnic Institute Troy, NY 12180 518-276-4458 ------------------------------------------------------------------------------ Rapidly troubleshoot problems before they affect your business. Most IT organizations don't have a clear picture of how application performance affects their revenue. With AppDynamics, you get 100% visibility into your Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro! http://pubads.g.doubleclick.net/gampad/clk?id=84349831&iu=/4140/ostg.clktrk _______________________________________________ Ganglia-general mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/ganglia-general
