[HACKERS] Re: Allowing WAL fsync to be done via O_SYNC

[Thomas Lockhart]

> Well, that's exactly *why* we need an overridable default.  Or would you
> like to try to do some performance measurements in configure?

At this point I'm more comfortable with a compile-time option
(determined statically or in a configure compilation test, not a
performance test), rather than a GUC variable. But imho 7.1 will be nice
with either choice, and if you think that a variable will make it easier
for developers to do tuning from a distance (as opposed to having it
just confuse new users) then... ;)

                    - Thomas

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