node.js mongoose.js memory leak?

Question

I'm creating bower package search site (everything is open sourced) and I hit the wall. I have some memory leak (or I think I have) and I honestly don't know why it is there.

You can download it and run on Your own, but simple hint will help me greatly.

I have narrowed it down to this function call here https://github.com/kamilbiela/bowereggs-backend/blob/master/main.js#L14 ( nest.fetchAndSave() ) which is all defined here: https://github.com/kamilbiela/bowereggs-backend/blob/master/lib/nest.js

Basically it downloads a package list from internet, Json.parse and inserts it into database, plus some when.js promises.

Running this function few times creates a 30mb of memory per run, that is not cleaned by garbage collector. Also note that this is my first "real" node.js project, so I'll be really grateful for any tip.

Answer 1

For anyone having the same problem:

https://github.com/c4milo/node-webkit-agent

After making few heap dumps I discovered that objects are garbage collected and the real memory usage isn't tied to it. I think that real memory usage is bigger because of using mongo and other non node.js stuff. Also real memory usage stabilizes at ~300mb, heap dumps at ~35mb.