smitty1e on The perils of UUID primary keys in SQLite

Comment on The perils of UUID primary keys in SQLite parent

':memory:'

Except this source code is not using :memory: The linked source code has

    (defonce db
      (d/init-db! "db/db.db"
        {:pool-size 4 :pragma {:synchronous "FULL"}}))

That's writing to disk.

andersmurphy 3mo

Yes it's writing to disk (on a M1 mac which has terribly slow fsync). But, because of the transaction the fsync dance is done once per batch. Each row is the id + a 50 byte data blob.

There's only one index so there's no real write amplification. The numbers will go down as you add more data and indexes.

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