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One thing I discovered benching Oracle instances is that cloud performance is extremely non deterministic. Sometimes you get variance each run. Sometimes you ge
by brucethemoose2 4y ago
One thing I discovered benching Oracle instances is that cloud performance is extremely non deterministic. Sometimes you get variance each run. Sometimes you get consistent results, but then you bench it later and the results are consistent, but totally different.
Then I would run the same bench on my laptop and (with turbo disabled) ands its pretty much always consistent.
I can only guess why... turbo on the host cpu? Other transient tenants competing for the same cache? Something to do with VMs? Also I am not sure if AWS has this issue.
- userbinator 4y agoYou're sharing the same hardware, with who knows how many others.
- brucethemoose2 4y agoYeah. Hence I'm saying an AWS c6i is maybe the wrong platform for benchmarks... Bare metal ia OK if you must test NUMA and such, but you are still at the mercy of turbo behavior, where you can completely control that in a local machine.