Magento add limit to product collection - magento-1.9

Question

I'm trying to show last 150 added products.
I'm creating the module and add in xml
<reference name="content">
<!-- Add product list to content -->
<block type="newprod/product_list" name="product_list" template="catalog/product/list.phtml">
<!-- Add toolbar to product list -->
<block type="catalog/product_list_toolbar" name="product_list_toolbar" template="catalog/product/list/toolbar.phtml">
<!-- Add pager to toolbar -->
<block type="page/html_pager" name="product_list_toolbar_pager"/>
</block>
<!-- Specify toolbar block name -->
<action method="setToolbarBlockName">
<name>product_list_toolbar</name>
</action>
<!-- Use custom product collection -->
<action method="setCollection">
<value helper="newprod/getProductCollection" />
</action>
<!-- Use custom available sort by orders -->
<action method="setAvailableOrders">
<value helper="newprod/getAvailableOrders" />
</action>
<!-- Set the default sort by order -->
<action method="setSortBy">
<value>price</value>
</action>
<!-- Set default direction to ascending -->
<action method="setDefaultDirection">
<value>asc</value>
</action>
<action method="setColumnCount">
<column>12</column>
</action>
<action method="setLimit"><limit>50</limit></action>
</block>
</reference>
in getProductCollection
public function getProductCollection()
{
$collection = Mage::getResourceModel('reports/product_collection')
->addStoreFilter($store_id)
->addAttributeToFilter('visibility', 4)
->addAttributeToFilter('status', 1)
->addAttributeToSelect('*')
->setVisibility(array(2,3,4))
->setOrder('created_at', 'desc')
->setPage(1, 9);
return $collection;
}
but in result page I get n items on page and it's fine, but pager render for all 10000 products, how can I limit this? I'm trying to play with _beforeToHtml() function from mycomp_NewProd_Block_Product_List extends Mage_Catalog_Block_Product_List but now luck.

Answer 1

Maybe you can add
->setPageSize(150)
before return collection.