What Is An In-Memory Database?

Written by Indicative Team


In-Memory Database Defined

An in-memory database, also known as a main memory database, can be defined as a type of non-relational database management system that depends on main memory (RAM) for computer data storage. Simply, an in-memory database relies primarily on memory for data storage, rather than storage disks or SSDs.

As all data is stored and managed in specialized indexing data structures, exclusively in the main memory, a computers or users need to access disks is eliminated, allowing for quicker response time for retrieval. This is ideal for applications that require microsecond response times and can have large spikes in traffic coming at any time such as real-time analytics or session stores.

This type of database also allows for data to be available at any time, enabling the ability to read and write data so quickly that it enables mixed transaction/analytical and read/write workloads.

Overall, the advantages of having an in-memory database include:

  • Big data management
  • Real-time updates
  • Faster queries 
  • Reduced IT costs

Popular in-memory databases include:

  • Amazon Elasticache for Redis
  • Aerospike

In Data Defined, we help make the complex world of data more accessible by explaining some of the most complex aspects of the field.

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