You should definitely try Meilisearch again. We have optimized a lot of the consumption and indexation performance. Even with all the improvements, we think it's essential to continue focusing on it during 2023.

And indeed, Meilisearch uses memory-mapping, which means that everything is on disk, and it will try to take as much memory as possible. For your information, we successfully ran a 115M documents dataset on a 1Gb RAM machine.