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comment How do I find the cause for a huge difference in performance between two identical Ubuntu servers?
You are right, our load balancer does that too - it's actually a feature. So I measured in lots of ways, and yes, I even "replayed" the same requests on each server individually once. But even to simply put all live traffic to a single server for some time and compare the time each server needed to prepare the response yields the same results as the more complex setups.
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revised How do I find the cause for a huge difference in performance between two identical Ubuntu servers?
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comment How do I find the cause for a huge difference in performance between two identical Ubuntu servers?
The output of dstat showed pretty clearly, that the difference in performance occurs also, when no IO is happening. Installing syscfg on Ubuntu 10.4 seems tricky indeed. I did compare the output of dmidecode already, would sysctl show more? Maybe it is less work to photos of each BIOS screen and compare them. I might try this.
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comment How do I find the cause for a huge difference in performance between two identical Ubuntu servers?
Thanks, no obvious difference in the output of these commands, unfortunately.
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