Piotr Gasidło wrote:
I _can_ afford of loosing some data in case of power failure. But I'm afraid of having database in unrecoverable state after crash.
Then turn off synchronous_commit. That's exactly the behavior you get when it's disabled: some data loss after a crash, no risk of database corruption, and faster performance without needing a controller with a battery.
If you've already got a RAID controller that accepts a battery, it would be silly not to then buy one though. The controller is normally 75% of the price of the combination, so getting that but not the final piece to really make it perform well wouldn't be a good move.
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