You paid one hundred bucks for that eight gb of ram, do you really want it to just sit there unused?

No, but my manager was wondering why our website was slowing to a crawl.

Is the DB on the same host as the web server?

It is more likely they did not leave enough overhead for the host operating system, which is a classic issue.

I don't really remember, to be fair this was nearly 10 years ago now. Upon some googling now, I do see a way to limit just how much Mongo sucks up for data + index. I am curious if it would have been a smoother experience, if this configuration was even available then.

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