Andrew Dunstan <andrew(at)dunslane(dot)net> writes:
>> Actually, once you build it this way, you could make all writes
>> synchronous (open the files O_SYNC) so that there is never any need for
>> explicit fsync at checkpoint time.
>>
> Or maybe fdatasync() would be slightly more efficient - do we care about
> flushing metadata that much?
We don't, but it would just obscure the discussion to spell out "fsync,
or fdatasync where available" ...
regards, tom lane