How to increase JS Heap size limit?

[tuma...@gmail.com]

Hi,

We need to increase the V8 heap size limit for certain case. Can some one please point me the source code where we can change this limit? 

Regards,

T. Umapathy

[Jochen Eisinger]

Is configuring the size via the ResourceConstraint class not covering your use case?

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[tuma...@gmail.com]

I tried with --js-flags="--max-old-space-size=10000" while launching my app (using CEF). 

And used below script to check (from https://bugs.chromium.org/p/v8/issues/detail?id=847)

(function () {
  function tree (n, m) {
    if (n > 0) {
      var a = new Array(m);
      for (var i = 0; i < m; i++) a[i] = tree(n - 1, m);
      return a;
    }
  } 

  var trees = [];
  while (true) trees.push(tree(15, 2));
})();

After some time, the allocation in below line (in src\heap\spaces.cc PagedSpace::Expand()) fails and render process is crashing (memory usage was around 3GB +).

------------------------------------------------------------------------------------------------------------------------------------------------

Page* p = heap()->isolate()->memory_allocator()->AllocatePage(size, this,
                                                                executable());
  if (p == NULL) return false;

[tuma...@gmail.com]

Exactly It fails in committing memory in VirtualAlloc (in file platform-win32.cc). 

bool VirtualMemory::CommitRegion(void* base, size_t size, bool is_executable) {

  int prot = is_executable ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE;

  if (NULL == VirtualAlloc(base, size, MEM_COMMIT, prot)) {

    return false;

  }

  return true;

}

Anybody knows whats going wrong here?

[Jochen Eisinger]

it means that the process ran out of memory. ~3GB sounds like you're running a 32bit build?

[tuma...@gmail.com]

I am using 64 bit build. This issue is reproducible in Windows machine. I tried in MAC 64 bit build, it runs fine until it reaches the limit easily.

Steps to reproduce it in chrome browser (64bit):

1. launch from command line with args --js-flags="--max-old-space-size=10000"

2. use chrome developer tools to run the below script from console.

(function () {
  function tree (n, m) {
    if (n > 0) {
      var a = new Array(m);
      for (var i = 0; i < m; i++) a[i] = tree(n - 1, m);
      return a;
    }
  } 

  var trees = [];
  while (true) trees.push(tree(15, 2));
})();

[tuma...@gmail.com]

VirtualAlloc fails with following error "ERROR_COMMITMENT_LIMIT 1455 (0x5AF) The paging file is too small for this operation to complete."

Any Idea how this limit can be increased?