Answer by Anton Cohen for How do I find the cause for a huge difference in...
Try some profiling tools, either system profiling like perf or Java profiling like VisualVM. With perf you could profile either the running Java process by PID or profile a benchmark. Look at both...
View ArticleAnswer by ArrowInTree for How do I find the cause for a huge difference in...
Why has nobody suggested 'sysprof'..? This is what it was designed for. Or ummm second thought... try stuffing some limits in /etc/security/limits.conf Try both. If you get nothing.... you have a...
View ArticleAnswer by voretaq7 for How do I find the cause for a huge difference in...
This sounds like it might be load-balancer related to me. When you say "same workload" how are you measuring this? Are you directly benchmarking each server by applying a test load in isolation? or Are...
View ArticleAnswer by SolarKennedy for How do I find the cause for a huge difference in...
More possibilities to output and diff: sysctl -a (make sure kernel tuneables are the same) cat /proc/interrupts (Maybe there is some other piece of hardware messing up?) ipmitool sensor list (long...
View ArticleAnswer by chutz for How do I find the cause for a huge difference in...
Two ideas, depending on how far you want to go with this: Swap the disks of both servers and see if the speed performance stays on the hardware or moves with the software. Compare the output of...
View ArticleHow do I find the cause for a huge difference in performance between two...
I am running two Dell R410 servers in the same rack of a data center (behind a load balancer). Both have the same hardware configuration, run Ubuntu 10.4, have the same packages installed and run the...
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