shows SnapBuildPurgeOlderTxn as pretty fully exercised.
I wasn’t aware of this website before, so thank you for sharing it. Actually, this patch evolved from a tiny, "casual" quick-fix patch in its very first version. I agree that the current effort invested in it possible has outweighed the potential benefits it may bring.
On a side note, I’m a beginner with PostgreSQL and trying to take on some simple tasks while deepening my understanding of the system. I noticed that many items in the coverage tests you provided have rather low coverage rates (< 75%). Do you think it would be worthwhile to add more test cases to improve their test coverage? I’d appreciate any advice the community can offer on this.
