On Thu, Feb 1, 2024 at 04:42 Laurenz Albe <laurenz.albe@xxxxxxxxxxx> wrote:
Today, the only feasible solution is not to create more than 64 subtransactions
(savepoints or PL/pgSQL EXCEPTION clauses) per transaction.
Sometimes, a single subtransaction is enough to experience a bad SubtransSLRU spike:
I think 64+ nesting level is quite rare, but this kind of problem that hits you when you have high XID growth (lots of writes) + long-running transaction is quite easy to bump into. Or this case involving MultiXactIDs:
Nik
