Re: relfrozenxid may disagree with row XIDs after 1ccc1e05ae

Hi

On Fri, May 17, 2024 at 12:38 AM Andres Freund <andres(at)anarazel(dot)de> wrote:

> Hi,
>
> On 2024-05-16 15:31:20 +0800, Bowen Shi wrote:
> > Yes, I have preserved the coredump file of vacuum and several other
> related
> > processes. It has been at least 10 minutes stuck in the retry loop since
> I
> > dumped this core file.
>
> Could you print out *vacrel?
>
> I'm wondering if there was index processing, due to the number of tuples.
> And
> if so, what type of indexes. There'd need to be something that could lead
> to
> new snapshots being acquired...
>

(gdb) p * vacrel
$2 = {rel = 0x2403028, indrels = 0x234e550, nindexes = 12, bstrategy =
0x2368e28, pvs = 0x0,
aggressive = false, skipwithvm = true, consider_bypass_optimization =
false,
do_index_vacuuming = true, do_index_cleanup = true, do_rel_truncate =
true, cutoffs = {
relfrozenxid = 927, relminmxid = 1, OldestXmin = 1106, OldestMxact = 1,
FreezeLimit = 4244968402, MultiXactCutoff = 4289967297},
vistest = 0xe693f0 <GlobalVisDataRels>, NewRelfrozenXid = 1106,
NewRelminMxid = 1,
skippedallvis = false, dbname = 0x234e7f0 "db1", relnamespace = 0x234eb38
"public",
relname = 0x234eb48 "t1", indname = 0x0, blkno = 349565,
offnum = 10, phase = VACUUM_ERRCB_PHASE_SCAN_HEAP, verbose = false,
dead_items = 0x7fa22f48d040, rel_pages = 1302478, scanned_pages = 349566,
removed_pages = 0,
frozen_pages = 592, lpdead_item_pages = 349565, missed_dead_pages = 0,
nonempty_pages = 349495, new_rel_tuples = 0, new_live_tuples = 0,
indstats = 0x234e6e0,
num_index_scans = 1, tuples_deleted = 11184540, tuples_frozen = 1540,
lpdead_items = 11184540,
live_tuples = 1540, recently_dead_tuples = 0, missed_dead_tuples = 0}
(gdb) p * vacrel->bstrategy
$3 = {btype = BAS_VACUUM, nbuffers = 32, current = 30, buffers = 0x2368e34}

--
Regards
Bowen Shi