Views Pagination

Hi,

I am using custom pagination in views results(not the one which view provides). I am getting all the records using below code -
$view = views_get_view('trending_tags');
$view->set_display(NULL);
$view->pre_execute();
$view->execute();
$arr_trending_tags = $view->result;
I am getting all the records even if i give pager option in views UI for this particular view. I have tried using below code as well -
$view->set_items_per_page(3);

Because my pagination is custom so it will not take this set_items_per_page() params.

If there are 100 records are available in my DB for this view but I want to fetch only 3 usnig some kind limit which cna work properly with my pagniation.

Pleas suggest your ideas.

Thanks.