DBA Fundamentals: Configuration: Lock Pages in Memory (LPIM)

To talk about lock pages in memory, you have to talk about paging. You have to talk about disk and memory too. If there are too many requests, too many things going on in memory and there's not enough RAM, the OSV go and use the page file as secondary storage, and if there's one thing we know about disks, or where page file is, is they are slow.