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
