Recently i ran into RAM troubles on my vserver for some reasons, i encountered the evil:
Cannot allocate memory at ...
So first i suspected mongodb to use up loads of memory as top showed.
The true RAM monsters were some apache and php-fpm zombies, but thats another story.
While suspecting mongodb i thought about outsourcing the mongodb and i found a free and sufficient offer in mongolab.
My interests were on and i gave it a try.
The free version has a limit for up to 240MB storage and since my app is just a small counter it should last for some time.
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