| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Luca Ferrari <fluca1978(at)gmail(dot)com> |
| Cc: | pgsql-general <pgsql-general(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: ANALYZE, pg_class.xmin && pg_class.reltuples |
| Date: | 2021-11-25 16:07:53 |
| Message-ID: | 297264.1637856473@sss.pgh.pa.us |
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| Thread: | |
| Lists: | pgsql-general |
Luca Ferrari <fluca1978(at)gmail(dot)com> writes:
> I've a doubt about running ANALYZE and inspecting pg_class.xmin and
> pg_class.reltuples.
> ...
> So the pg_class record has changed its content, and in fact we are now
> 2 transaction away the table creation, but the pg_class.xmin is the
> same.
ANALYZE (and VACUUM) update the table's pg_class row non-transactionally.
See the comments for vac_update_relstats():
regards, tom lane
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