Kendo Method ToDataSourceResult gives timeout exception for large number of records - kendo-grid

Question

I am using Kendo Grid as below:
Html.Kendo().Grid<MyViewModel>()
.Name("grid")
.Columns(c => c.AutoGenerate(false))
.Filterable(f =>
{
//coding for filteration
})
.Selectable(selectable => selectable.Mode(GridSelectionMode.Single))
.Reorderable(r => r.Columns(true))
.Pageable(pager => pager
.Refresh(true)
//coding for pages
)
.Sortable().Selectable(selectable => selectable.Mode(GridSelectionMode.Multiple))
.Scrollable(s => s.Height(450))
.Filterable()
.Resizable(r => r.Columns(true))
.DataSource(dataSource => dataSource.Ajax()
.Events(ev => ev.RequestEnd("onRequestEnd"))
.Sort(sort => { sort.Add(model => model.Date).Descending(); })
.Filter(f => f.Add(model => model.SerialNo).IsEqualTo((this.Session["Id"] as MyModel).SerialNo)) // Applying Custom Filter
.PageSize(10)
.ServerOperation(true)
.Read(read => read.Action("Read", "Controller").Data("Grid_Index_additionalData")))
.Events(events => events.DataBound("onDataBound"))
.Render();
Code in Controller :
[OutputCache(Duration = 0, VaryByParam = "None")]
public ActionResult Read([DataSourceRequest]DataSourceRequest request, string searchBox)
{
IQueryable<MyViewModel> filteredResult;
var collection1 = manager.Model1SelectAll();
var collection2 = manager.Model2SelectAll();
filteredResult = from c1 in collection1
join c2 in collection2
on c1.SerialNo equals c2.SerialNo
select new MyViewModel
{
Prop1 = c1.Prop1,
Prop2 = c1.Prop2,
Prop3 = c1.Prop3,
Prop4 = c1.Prop4,
SerialNumber = c1.SerialNo,
Prop5 = c2.Prop5,
Prop6 = c2.Prop6
};
var result = filteredResult.ToDataSourceResult(request);
// filteredResult is IQueryable of around 3 million records
// filtering these on basis of request.Sorts and request.Filter will give 100 records
// But I receive TimeOut exception here
try
{
var serializer = new JavaScriptSerializer { MaxJsonLength = int.MaxValue };
var jsonResult = new ContentResult
{
Content = serializer.Serialize(result),
ContentType = "application/json"
};
return jsonResult;
}
catch (Exception ex)
{
ExceptionService.LogException(ex);
}
}
My filteredResult contains 3 million records which gives TimeOut Exception while calling ToDataSourceResult().
Also if I try to use filteredResult.ToList() => that gives me MemoryException.
I am unable to remove Timeout exception. Kendo says that if we pass IQueryable to ToDataSourceResult, it will handle all filtering, But in my case it gives exception.
I have tried creating my own alternative of ToDataSourceResult() by handling all request.Sorts and Filters and passign just pagesize records using
this.ObjectSet.Where(whereCondition).OrderBy("it." + sortBy).Skip(pageSize * (pageNumber - 1)).Take(pageSize);
But this way I am unable to handle all the cases of filter and make this method generic for all the grids in my project.