I am posting arrays of related field ids using the product id as the key, to my controller:

		$input = Input::except('_token');
		foreach ($input as $k=>$v){
			$item = Product::find($k);
			$item->othercats()->sync($v);
		}

This data comes from a large table of checkboxes in which I check any related items I want linked to each product in a table row. This has worked great up to recently as I seem to have reached a certain threshold with Mysql and can't work out what it is. Would anyone be able to point me in the right direction as far as what php.ini settings I may have to adjust to cope with this style of updating operation?