On 11/28/18 7:32 PM, Ron wrote:
> What does it mean, and where is it documented? The only place in the
https://www.postgresql.org/docs/10/routine-vacuuming.html
"The age column measures the number of transactions from the cutoff XID
to the current transaction's XID."
> docs I see reference to age() is
> https://www.postgresql.org/docs/9.6/functions-datetime.html and this
> doesn't seem to fit that use case.
>
> Thanks
>
> TAPb=# select COALESCE(ta.schemaname, 'pg_toast') || '.' || cl.relname,
> cl.relfrozenxid,
> age(cl.relfrozenxid)
> from pg_class cl FULL JOIN pg_tables ta
> ON ta.tablename = cl.relname
> where not cl.relfrozenxid = xid '0'
> --and age(cl.relfrozenxid) > 4000000
> order by 1
> limit 30;
> ?column? | relfrozenxid | age
> -------------------------------+--------------+---------
> cds.ach_return_batch | 58569152 | 2111005
> cds.ach_return_detail | 58569152 | 2111005
> cds.all_day_event | 58569152 | 2111005
> cds.all_day_event_trigger | 58569152 | 2111005
> [snip]
> cds.bank_ftp | 58569152 | 2111005
> cds.bank_health_care_job | 58569152 | 2111005
> cds.bank_inbound_file | 58569152 | 2111005
> cds.bank_input_format | 58569152 | 2111005
> (30 rows)
>
>
--
Adrian Klaver
adrian.klaver@aklaver.com