nodejs memory profiling

Question

Need to profile node process. i've some memory leaks in production, after some days of running node process.

i've tried node-inspector + v8, but it doesn't work, in new version of node-inspector there is no Profile tab. and in old version when i start profiling error is fired and debugging stopped.

i've also tried nodetime.com, but it doesn't show what i need, also it takes too much memory, it's not for production.

i've also tried dtrace (http://blog.nodejs.org/2012/04/25/profiling-node-js/) but it doesn't give me necessary information.

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so what information i need for profiling memory:
get live instances, instances count, size in memory, instance types

do u know how to get that information?

Answer 1

You can try to use look module. It based on nodetime but works locally.

Answer 2

I've found node-memwatch useful.

The downside is you have to embed it in your application and have a bit of code for it, but it's useful for checking the heap at various places to see how much it changed after you did something.