Re: found xmin from before relfrozenxid on pg_catalog.pg_authid

On Mon, Mar 19, 2018 at 12:46 PM, Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>
wrote:

> Jeremy Finzel wrote:
> > Getting some concerning errors in one of our databases that is on 9.5.11,
> > on autovacuum from template0 database pg_authid and pg_auth_members. I
> > only saw some notes on the list about this error related to materialized
> > views. FWIW, we did use pg_upgrade to upgrade this database from 9.4 to
> > 9.5. Here is an example:
> >
> > 2018-03-19 12:08:33.946 CDT,,,14892,,5aafee91.3a2c,1,,2018-03-19
> 12:08:33
> > CDT,59/340951,0,ERROR,XX001,"found xmin 2906288382 from before
> relfrozenxid
> > 740087784",,,,,"automatic vacuum of table
> > ""template0.pg_catalog.pg_authid""",,,,""
>
> Can you please supply output of pg_controldata?
>
> --
> Álvaro Herrera https://www.2ndQuadrant.com/
> PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
>

Please forgive my accidental top-post. Here:

pg_control version number: 942
Catalog version number: 201510051
Database system identifier: 6351536019599012028
Database cluster state: in production
pg_control last modified: Mon 19 Mar 2018 12:56:10 PM CDT
Latest checkpoint location: 262BE/FE96240
Prior checkpoint location: 262BA/623D5E40
Latest checkpoint's REDO location: 262BA/F5499E98
Latest checkpoint's REDO WAL file: 00000001000262BA000000F5
Latest checkpoint's TimeLineID: 1
Latest checkpoint's PrevTimeLineID: 1
Latest checkpoint's full_page_writes: on
Latest checkpoint's NextXID: 16/3132524419
Latest checkpoint's NextOID: 1090653331
Latest checkpoint's NextMultiXactId: 2142
Latest checkpoint's NextMultiOffset: 5235
Latest checkpoint's oldestXID: 1829964553
Latest checkpoint's oldestXID's DB: 12376
Latest checkpoint's oldestActiveXID: 3131774441
Latest checkpoint's oldestMultiXid: 1
Latest checkpoint's oldestMulti's DB: 16400
Latest checkpoint's oldestCommitTsXid:1829964553
Latest checkpoint's newestCommitTsXid:3132524418
Time of latest checkpoint: Mon 19 Mar 2018 12:54:08 PM CDT
Fake LSN counter for unlogged rels: 0/1
Minimum recovery ending location: 0/0
Min recovery ending loc's timeline: 0
Backup start location: 0/0
Backup end location: 0/0
End-of-backup record required: no
wal_level setting: logical
wal_log_hints setting: off
max_connections setting: 2000
max_worker_processes setting: 10
max_prepared_xacts setting: 0
max_locks_per_xact setting: 64
track_commit_timestamp setting: on
Maximum data alignment: 8
Database block size: 8192
Blocks per segment of large relation: 131072
WAL block size: 8192
Bytes per WAL segment: 16777216
Maximum length of identifiers: 64
Maximum columns in an index: 32
Maximum size of a TOAST chunk: 1996
Size of a large-object chunk: 2048
Date/time type storage: 64-bit integers
Float4 argument passing: by value
Float8 argument passing: by value
Data page checksum version: 0

Thanks,
Jeremy