On Thursday 21 October 2010 21:42:06 Kevin Grittner wrote: > Bruce Momjian <br...@momjian.us> wrote: > > I assume we send a full 8k to the controller, and a failure during > > that write is not registered as a write. > > On what do you base that assumption? I assume that we send a full > 8K to the OS cache, and the file system writes disk sectors > according to its own algorithm. With either platters or BBU cache, > the data is persisted on fsync; why do you see a risk with one but > not the other? At least on linux pages can certainly get written out in < 8kb batches if youre under memory pressure.
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