Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
> Other backend will see they are not the lowest
> WAIT_ON_FSYNC and will wait for their byte to be set to NOT_IN_COMMIT
> so they can then continue, knowing their data was synced.
How will they wait? Without a semaphore involved, your answer must
be either "timed sleep" or "busy-wait loop", neither of which is
attractive ...
regards, tom lane