Authors: Andrew Tanner, Manas Paldhe, Stefan Wild, Tristan FletcherInstacart is the leading online grocery company in North America. Users can shop from more than 75,000 stores with more than 500 million products on shelves. We have millions of active users who regularly place multiple orders with tens of items in their cart every month. To serve the growing user base and their needs, we have to efficiently store and query hundreds of terabytes of data. Our primary datastore of choice is Postgre...