we are having a serious performance issue in one certain circumstance.
we have a sales order with 1800 items on it. of these 1800 items, 21 have generated a third party PO, for the goods to be shipped directly to the customer from the supplier.
When we make a change to the purchase order, for example, to update the confirmation, and hit save, even for a single item, it can take more than a minute to do the update. It appears it is looping through the VBUP table for ALL items in the sales order, and any follow on documents, and pulling in first all VBUP records for the order, then all vbup records for the item. So it appears we are reading the full VBUP for the entire order 1800 times! THis is regardless of the fact that we have the sales order and item, so we dont need to read the entire VBUP for the sales document, and also regardless of the fact that only 21 of the items on the sales order have anything to do with our purchase order!
I have tried a trace to see where VBUP is getting read and it is 90% of the response time of the save being used just read these records, over and over and over.
Has anyone ever seen this or found a fix? i have searched google and here and OSS.
What ties the PO to the sales order, other than the account assignment? what about the sales order is getting updated when we change a PO item, especially, just a confirmation?
I have checked for user exits, etc, and we are running this vanilla.