On Thursday 21 October 2010 21:42:06 Kevin Grittner wrote: > Bruce Momjian <bruce@xxxxxxxxxx> 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. Andres -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
