Hi,
On 2022-07-20 11:35:13 -0400, Greg Stark wrote:
> Is it true that the shared memory allocation contains the hash table
> entry and body of every object in every database?
Yes. However, note that that was already the case with the old stats
collector - it also kept everything in memory. In addition every read
access to stats loaded a copy of the stats (well of the global stats and
the relevant per-database stats).
It might be worth doing something fancier at some point - the shared
memory stats was already a huge effort, cramming yet another change in
there would pretty much have guaranteed that it'd fail.
Greetings,
Andres Freund