Jim Nasby <decibel@decibel.org> writes:
> On Apr 24, 2010, at 10:02 PM, Tom Lane wrote:
>> Yeah. I think we also use RelFileNode as a hash tag in places, and
>> so adding a bool to it would be problematic for a couple of reasons:
>> possibly uninitialized pad bytes, and uselessly incorporating more bytes
>> into the hash calculation.
> Do we need to hash it that frequently?
Every buffer access, for instance.
> Do we insert tons of them into WAL?
Yes; the vast majority of WAL records contain one.
regards, tom lane
