One of the principal needs in Online Transaction Processing (OLTP) systems is to get as much speed as possible in order to support more transactions. Some systems simply cannot support the transaction loads necessary because of limitations on the speed of disks and disk controllers. Microsoft introduced the memory-optimized, also called in-memory, technology in SQL Server and Azure SQL Database to help deal with this situation. While the memory-optimized tools are extremely useful, they are also extremely specialized. As such, they should be approached with some caution. However, on systems with the right amount of memory, in-memory tables and native stored procedures produce lightning-fast speed.