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None of what you said makes ANY sense. Have you ever actually scaled an app before ?

Adding more app servers increases the number of requests you can handle. It doesn't make slow apps or latency faster. Both of those are possible causes for why certain requests may be slower. It's not necessarily a database problem.

> Did you read the article?

Yes. I read the documentation before installing MongoDB so I haven't had any problems (so far).

There's no reason other than the data store that would make their site that slow. Yes I have experience in this area. Until they come out and tell me otherwise I'm gonna bet that the data store is at fault. I could be wrong but I'm willing to give you 5 to 1 odds against.

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