In-memory database

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Did you know you can make PostgreSQL run almost fully in-memory?

Postgres docs explicitly describe a non-durable setup where you can put the whole data directory on a RAM disk and disable:

fsync: don’t force writes to durable storage

synchronous_commit: don’t make COMMIT wait for WAL to flush

You basically trade durability for speed.

Pretty interesting that PostgreSQL can be pushed this far without switching to a separate in-memory database.

It’s a game-changer for running in CI, it’s so much faster