How to investigate heap out of memory in NextJS

[nodeworks]

Was wondering where I can dig in to get more information on this Ineffective mark-compacts heap error:

The only thing I can think of is that I use a long maxInactive age:

onDemandEntries: {
  maxInactiveAge: 24 * 60 * 60000
}

But would that actually be the reason if I'm only really working on 1 or 2 pages? The error usually comes about after 2-3 days.

[jamesmosier]

You could maybe try increasing the heap memory size as mentioned here: node --max-old-space-size=2048 ./node_modules/.bin/next dev

Aside from that, there are a few other issues mentioning this that may or may not be helpful.

[nodeworks]

I have max old space size set:

--max_old_space_size=18192

[devdogfish]

I had the same bug and after hours of digging found the error in my code. It was an infinite loop caused by a mistake in the JWT tokens and authentication flow, where a condition triggered the token function to repeat endlessly, eventually consuming all the memory.

That is why increasing memory also didn't work.

The cause might be different for you, but just a tip: check your code for infinite loops.