To ensure the item cache stays up to date, SuiteCommerce Product Feeds checks every 15 minutes for any changes in item availability, or in item and image links. For example, if your web store is set up to hide items when out of stock and the inventory stock for an item is 0, information for that item will not be retrieved during the item caching. When the item comes back into stock, it is included during the next caching process. An optimized full rebuild of the item cache is performed every 2 hours.