I have a serious problem is that my shop is made up of many products and small amount, so when a customer places an order can put more than 10/15 different products.
The problem is that when you carry about 15 different products at once they all disappear and the car is empty, there is no record of the order and have to start over.
Is there any memory problem or bug virtuemart?
Changing the Joomla session table provides a fix.
http://forum.virtuemart.net/index.php?topic=99768.15