| From: | Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com> |
|---|---|
| To: | Justin Pryzby <pryzby(at)telsasoft(dot)com>, Jeff Janes <jeff(dot)janes(at)gmail(dot)com> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Jesper Pedersen <jesper(dot)pedersen(at)redhat(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, "Jamison, Kirk" <k(dot)jamison(at)jp(dot)fujitsu(dot)com>, Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, Michael Paquier <michael(at)paquier(dot)xyz>, "fabriziomello(at)gmail(dot)com" <fabriziomello(at)gmail(dot)com>, "pgsql-hackers(at)lists(dot)postgresql(dot)org" <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Bruce Momjian <bruce(at)momjian(dot)us> |
| Subject: | Re: pg_upgrade: Pass -j down to vacuumdb |
| Date: | 2019-04-04 14:20:26 |
| Message-ID: | 18557ba2-3ee7-9e17-44f2-e208d26b8640@2ndquadrant.com |
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| Lists: | pgsql-hackers |
On 2019-04-03 23:24, Justin Pryzby wrote:
> I just did a test on one of our large-but-not-huge customers. With
> stats_target=1, analyzing a 145GB partitioned table looks like it'll take
> perhaps an hour; they have ~1TB data, so delaying services during ANALYZE would
> nullify the utility of pg_upgrade. I can restore the essential tables from
> backup in 15-30 minutes.
I think the real fix is to have pg_upgrade copy over the statistics.
They are right there after all, just take them.
--
Peter Eisentraut http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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