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Asked: 2026-05-28T15:08:52+00:00

I got a fatal error reading a file that was too big to fit

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I got a fatal error reading a file that was too big to fit in a buffer.

FATAL ERROR: v8::Object::SetIndexedPropertiesToExternalArrayData() length exceeds max acceptable value

Or,

RangeError: "size" argument must not be larger than 2147483647
at Function.Buffer.allocUnsafe (buffer.js:209:3)

If I try to allocate a 1GB Buffer I get the same fatal Error,

var oneGigInBytes = 1073741824;
var my1GBuffer = new Buffer(oneGigInBytes); //Crash

What is the maximum size of a Node.js Buffer class instance?

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1 Answer

  1. Editorial Team

    Maximum length of a typed array in V8 is currently set to kSmiMaxValue which depending on the platform is either:

    • 1Gb – 1byte on 32-bit
    • 2Gb – 1byte on 64-bit

    Relevant constant in the code is v8::internal::JSTypedArray::kMaxLength (source).

    V8 team is working on increasing this even further on 64-bit platforms, where currently ArrayBuffer objects can be up to Number.MAX_SAFE_INTEGER large (2**53 – 1). See bug 4153.

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