Tom Lane wrote: > I'd ask you the same question I asked Thomas: do you continue to get those log messages > during subsequent checkpoints? No, I don't. The error did not reappear during ~2h of continuous inserts since my report, didn't reappear after a forced checkpoint (i.e., via psql), and did not reappear on a recent stop/start cycle. There was a period when my cron-driven vacuuming was broken and, in principle, I might have been susceptible to wraparound. However, I don't see how we could have had 1B transactions in that period. One other tidbit: a colleague inadvertently updated ~10M records. After this, I started getting errors like: number of page slots needed (2952496) exceeds max_fsm_pages (500000) I restored from a backup, but still have: 'number of page slots needed (183248) exceeds max_fsm_pages (50000)' (I reduced max_fsm_pages after the restore.) I'm not sure whether the vacuum and fsm info is relevant. -Reece -- Reece Hart, http://harts.net/reece/, GPG:0x25EC91A0