Big River Books
Stock 3.9 install...
Azure SQL DB S0 (Pricing Tier)
Web App Default0/Standard: 1 Medium
56,000+ skus updated every 24 hours with new inventory feed from custom C#/VB.net programs that pull from a local DB that consumes a text file feed from our Warehouse system.
Performance is pretty normal.
Only major troubles are...
1. Getting sitemap.xml files to download without timing out.
2. Slow checkout time when there are 100+ skus in the shopping cart.
Good luck. PM me if you have any other questions.