I am having a strange issue with ganglia reporting (not reporting) network traffic on a high volume web site. The graphs are reporting points of zero (0) data when SAR data is not showing the same information. Its disconcerting because if Ganglia is reporting good information then I have a problem. But all other indications are that things are fine.
Here's an example of the SAR data for the interface: Time Rx Tx 05:14:00 845.78 945.85 05:15:00 722.51 816.59 05:16:00 752.33 840.65 05:17:00 796.62 886.42 05:18:00 888.71 990.34 05:19:00 802.17 891.59 05:20:00 760.13 851.22 05:21:00 797.95 908.55 05:22:00 909.58 1009.56 And attached is a graph from ganglia during the same time period. Notice there is a big drop in RX between 5:15-5:20? Any ideas what might be causing the chart to do this? Do you think I am looking at a real problem or something with ganglia reporting? -- cp
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