Re: Proposal for 9.1: WAL streaming from WAL buffers

> Well, we're already not waiting for fsync, which is the slowest part.
> If there's a performance problem, it may be because FADVISE_DONTNEED
> disables kernel buffering so that we're forced to actually read the data
> back from disk before sending it on down the wire.

Well, that's fairly direct to solve, no?  Just disable FADVISE_DONTNEED
if walsenders > 0.

--                                  -- Josh Berkus                                    PostgreSQL Experts Inc.
                        http://www.pgexperts.com