Re: Setting BLCKSZ 4kB

Hi,

On 2018-01-26 23:53:33 +0100, Tomas Vondra wrote:
> But more importantly, I don't see why the size of the internal page
> would matter here at all? SSDs have non-volatile write cache (DRAM with
> battery), protecting all the internal writes to pages. If your SSD does
> not do that correctly, it's already broken no matter what page size it
> uses even with full_page_writes=on.

Far far from all SSDs have non-volatile write caches. And if they
respect barrier requests (i.e. flush before returning), they're not
broken.

Greetings,

Andres Freund