Why Redis cache is faster than DB?

Is Redis faster than DB?

Redis is faster though than most relational databases. If you're only going to be doing key:value pair queries, then you'll want to use Redis.

Why is Redis faster than SQL?

In Redis, Read and Write operations are extremely fast because of storing data in primary memory. In RDBMS, Read and Write operations are slow because of storing data in secondary memory. Primary memory is in lesser in size and much expensive than secondary so, Redis cannot store large files or binary data.

Is Redis cache faster than MySQL?

In terms of the efficiency of updating databases, Redis is superior to MySQL while SQLite is slowest. However, in terms of the efficiency of querying from databases, SQLite seems to be about ten times faster than Redis and MySQL.

Why is Redis so fast?

Built for Speed & Languages To work as quickly as it does, Redis uses a dataset that is in-memory. In order to maintain the data, you can save it to disk occasionally or attach all commands to a log. In fact, you don't always want persistence, so you can turn it off if you're using it to temporarily cache.