Querying available quantity costs 30 times more than querying quantity on hand

The only difference between 2 images is I query available on one and on_hand another. Since our client has 1800 products, we need 1800*30=54000 credits, thinking of the recovery rate of 600 credits per minute, it takes 90 minutes to get inventory for 1800 products. this is insane! I guess this is a bug, please assist

Hi Ahmett,
Welcome! Available does use more connections to find the result. It calculates by things like sell ahead, allocated, etc. Here is a better explanation Gotcha’s – Developer Resources | ShipHero