for (var time_pos = 0; time_pos < 24; time_pos++) {

    // This array contains 17 000 data
    var dataSliced = file.root.variables['pm10_conc'].readSlice(
        time_pos, time_size,
        level_pos, level_size,
        lat_from, lat_size,
        lng_from, lng_size
    );

    // Loop : 0 to 17 000
    for (var i = 0; i < dataSliced.length; i++) {
        var pollution = new Pollution();

        latitude   = current_lat;
        longitude  = currrent_lng;
        country    = country_name;
        model      = model_name;
        data_type  = type_name;
        level      = 0;
        datetime   = date;
        pollutants.pm10.description = description;
        pollutants.pm10.units = units;
        pollutants.pm10.concentration = dataSliced[i];

        pollution.save(function(err){
            if (err) throw err;
            console.log("Data saved");
        })
    }
}

<--- Last few GCs --->

   56782 ms: Mark-sweep 1366.6 (1436.9) -> 1366.6 (1436.9) MB, 1943.5 / 0.0 ms [allocation failure] [GC in old space requested].
   58617 ms: Mark-sweep 1366.6 (1436.9) -> 1366.6 (1436.9) MB, 1834.9 / 0.0 ms [allocation failure] [GC in old space requested].
   60731 ms: Mark-sweep 1366.6 (1436.9) -> 1368.6 (1417.9) MB, 2114.3 / 0.0 ms [last resort gc].
   62707 ms: Mark-sweep 1368.6 (1417.9) -> 1370.7 (1417.9) MB, 1975.8 / 0.0 ms [last resort gc].


<--- JS stacktrace --->

==== JS stack trace =========================================

Security context: 0x3a7c3fbcfb51 <JS Object>
    1: fnWrapper [/var/www/html/Project/node_modules/hooks-fixed/hooks.js:185] [pc=0x6ccee7825d4] (this=0x3a7c3fbe6119 <JS Global Object>)
    2: fn [/var/www/html/Project/node_modules/mongoose/lib/schema.js:~250] [pc=0x6ccee7d8ffe] (this=0xd29dd7fea11 <a model with map 0x994a88e5849>,next=0x1cbe49858589 <JS Function fnWrapper (SharedFunctionInfo 0x3d8ecc066811)>,done=0x1cbe498586...

FATAL ERROR: CALL_AND_RETRY_LAST Allocation failed - JavaScript heap out of memory
 1: node::Abort() [node]
 2: 0x1098b2c [node]
 3: v8::Utils::ReportApiFailure(char const*, char const*) [node]
 4: v8::internal::V8::FatalProcessOutOfMemory(char const*, bool) [node]
 5: v8::internal::Factory::NewTransitionArray(int) [node]
 6: v8::internal::TransitionArray::Insert(v8::internal::Handle<v8::internal::Map>, v8::internal::Handle<v8::internal::Name>, v8::internal::Handle<v8::internal::Map>, v8::internal::SimpleTransitionFlag) [node]
 7: v8::internal::Map::CopyReplaceDescriptors(v8::internal::Handle<v8::internal::Map>, v8::internal::Handle<v8::internal::DescriptorArray>, v8::internal::Handle<v8::internal::LayoutDescriptor>, v8::internal::TransitionFlag, v8::internal::MaybeHandle<v8::internal::Name>, char const*, v8::internal::SimpleTransitionFlag) [node]
 8: v8::internal::Map::CopyAddDescriptor(v8::internal::Handle<v8::internal::Map>, v8::internal::Descriptor*, v8::internal::TransitionFlag) [node]
 9: v8::internal::Map::CopyWithField(v8::internal::Handle<v8::internal::Map>, v8::internal::Handle<v8::internal::Name>, v8::internal::Handle<v8::internal::FieldType>, v8::internal::PropertyAttributes, v8::internal::Representation, v8::internal::TransitionFlag) [node]
10: v8::internal::Map::TransitionToDataProperty(v8::internal::Handle<v8::internal::Map>, v8::internal::Handle<v8::internal::Name>, v8::internal::Handle<v8::internal::Object>, v8::internal::PropertyAttributes, v8::internal::Object::StoreFromKeyed) [node]
11: v8::internal::LookupIterator::PrepareTransitionToDataProperty(v8::internal::Handle<v8::internal::JSObject>, v8::internal::Handle<v8::internal::Object>, v8::internal::PropertyAttributes, v8::internal::Object::StoreFromKeyed) [node]
12: v8::internal::StoreIC::LookupForWrite(v8::internal::LookupIterator*, v8::internal::Handle<v8::internal::Object>, v8::internal::Object::StoreFromKeyed) [node]
13: v8::internal::StoreIC::UpdateCaches(v8::internal::LookupIterator*, v8::internal::Handle<v8::internal::Object>, v8::internal::Object::StoreFromKeyed) [node]
14: v8::internal::StoreIC::Store(v8::internal::Handle<v8::internal::Object>, v8::internal::Handle<v8::internal::Name>, v8::internal::Handle<v8::internal::Object>, v8::internal::Object::StoreFromKeyed) [node]
15: v8::internal::Runtime_StoreIC_Miss(int, v8::internal::Object**, v8::internal::Isolate*) [node]
16: 0x6ccee4092a7
Aborted
[nodemon] app crashed - waiting for file changes before starting...