Bruce Momjian <br...@momjian.us> writes:
> Tom Lane wrote:
>> This is essentially the same reason why CREATE DATABASE and related
>> commands xlog directory copy operations only after completing them.
>> That potentially wastes much more than a few blocks; but it's still
>> non-dangerous, and far safer than the alternative.

> Is this documented in a C comment somewhere?  Obviously not in a place
> Robert found.

I had thought it was documented in the discussion of WAL logging rules
in access/transam/README, but it isn't.  I'll see about adding
something.

                        regards, tom lane

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