Re: relfilenode statistics

On Fri, 29 Nov 2024 at 20:20, Bertrand Drouvot
<bertranddrouvot(dot)pg(at)gmail(dot)com> wrote:
> On Fri, Nov 29, 2024 at 11:23:12AM +0500, Kirill Reshke wrote:
> > If we don’t have the relation OID when writing buffers out, can we
> > just store oid to buffertag mapping somewhere and use it?
>
> Do you mean add the relation OID into the BufferTag? While that could probably
> be done from a technical point of view (with probably non negligible amount
> of refactoring), I can see those cons:

Not exactly, what i had in mind was a separate hashmap into shared
memory, mapping buffertag<>oid.

> 2. Probably lot of refactoring
> 3. This new member would be there "only" for stats and reporting purpose as
> it is not needed at all for buffer related operations

To this design, your points 2&3 apply.

--
Best regards,
Kirill Reshke