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Your SSD lies but that's ok | Postgres fsync

The Backend Engineering Show with Hussein Nasser

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How to Configure Postgres for Fine Team Ability

There is an option when you open a file or wall writing, WAL says, Hey, I want to open with OSync. And that means every write that I do, just don't think, don't put it in your cache. But the moment I say, right, block me, please, I want you to block me and tell me when you actually fly, if you wrote everything into the desk, and then come back. So that's another thing. There is another option to open or direct, which is the most confusing option in existence, right? This is done through something called the DMA, the direct memory access.

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