Re: hyrax vs. RelationBuildPartitionDesc

Hi,

On 2019-03-13 16:50:53 -0400, Robert Haas wrote:
> On Wed, Mar 13, 2019 at 4:38 PM Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
> > On Wed, Mar 13, 2019 at 4:18 PM Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> > > Off topic for the moment, since this clearly wouldn't be back-patch
> > > material, but I'm starting to wonder if we should just have a context
> > > for each relcache entry and get rid of most or all of the retail
> > > cleanup logic in RelationDestroyRelation ...
> >
> > I think that idea might have a lot of merit, but I haven't studied it closely.
>
> It just occurred to me that one advantage of this would be that you
> could see how much memory was being used by each relcache entry using
> MemoryContextStats(), which seems super-appealing. In fact, what
> about getting rid of all allocations in CacheMemoryContext itself in
> favor of some more specific context in each case? That would make it
> a lot clearer where to look for leaks -- or efficiencies.

But it might also make it frustrating to look at memory context dumps -
we'd suddenly have many many more memory context lines we'd displayed,
right? Wouldn't that often make the dump extremely long?

To be clear, I think the idea has merit. Just want to raise the above
point.

Greetings,

Andres Freund