I have heard that mongodb use many memory, but I haven't much memory, I need run 2 or 3 apps on a 512M VPS, I want know are there any alternative choice, have easy to use API, and nodejs binding, and lightweight.
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1just because it _can_ use memory doesn't mean it _must_ use _all_ the available memory. – jcolebrand May 25 '11 at 17:23
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I'm gonna state the obvious, but why can't you use MongoDB? Just configure it to minimize memory use:
- For some tips, read "Finding a way to make MongoDB/MongoMapper/Passenger work on a small VPS".
- See a similar question: Feasability of running MongoDB on Linode 512 VPS?
Note that the high memory usage is one of the things that really make MongoDB so fast -- configurations with lower memory usage will degrade performance.
My second, obvious tip is that don't torture yourself with too small VPS slices. In total if invest a lot of time in building a system that works for small VPS while saving only some dollars in hosting fees, you are making bad business. Just to highlight let's make a short example: let's say you invest 100 hours of work in finding and configuring a document database that suits your 512M VPS, instead of buying like 2 Gig VPS. If you - by using smaller VPS - earn 25 dollars a month and your hourly salary is like 10 dollars, it would take over 3 years for you to gain your time commitment back in VPS fees. In 99% it is just not worth it!
