What is an in-memory database ?

In-memory database

An in-memory database stores all its data in the computer’s RAM, making data access faster. This is different from regular databases that use slower hard disks for storage.

SAP HANA‘s in-memory database quickly gets data from RAM, speeding up data retrieval for computers with many processors. Sectors like healthcare and telecom prefer in-memory databases for their quickness. Now, memory devices are cheaper, so more businesses can benefit from faster processing.

These databases work only in a computer’s memory and use storage to prevent crashes. While good databases act like in-memory ones by using memory for queries, true in-memory databases keep all data in memory from the start.

Unlike regular databases that get data when needed, in-memory ones quickly get data once loaded. While the first queries might be a bit slower, these systems get faster over time. They often use special ways to store data, like the key-value format, which makes them different from traditional databases that use SQL.

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