Re: fsync or fdatasync

"Gaetano Mendola" <mendola@bigfoot.com> writes:
> apparently the default value for wal_sync_method is fsync,
> and apparently the best method is fdatasync.

Best on what platform, and according to what evidence?

We'll be glad to consider changing the default for a specific platform
if we have a reasonably convincing argument that the other value is
better.  So far, not much study has been done of which method is best
on which platforms (and under what load conditions).

            regards, tom lane