ELI5: Explain Like I'm 5

In-memory database

In-memory databases are databases that keep their information in your computer's memory, like your RAM. It can be very useful because it is much faster than traditional databases stored on disk. Instead of having to wait for the database to find the information stored on a disk, the information is already in-memory and the database can access it right away. This makes things like searching or making changes much faster.
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