| From: | Jeff Davis <pgsql(at)j-davis(dot)com> |
|---|---|
| To: | Ashutosh Bapat <ashutosh(dot)bapat(dot)oss(at)gmail(dot)com> |
| Cc: | Corey Huinker <corey(dot)huinker(at)gmail(dot)com>, Andres Freund <andres(at)anarazel(dot)de>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Michael Paquier <michael(at)paquier(dot)xyz>, Nathan Bossart <nathandbossart(at)gmail(dot)com>, Bruce Momjian <bruce(at)momjian(dot)us>, Matthias van de Meent <boekewurm+postgres(at)gmail(dot)com>, Magnus Hagander <magnus(at)hagander(dot)net>, Stephen Frost <sfrost(at)snowman(dot)net>, Peter Smith <smithpb2250(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>, jian he <jian(dot)universality(at)gmail(dot)com> |
| Subject: | Re: Statistics Import and Export: difference in statistics dumped |
| Date: | 2025-02-28 20:10:37 |
| Message-ID: | 5053263e41692dc2358a642403e9aa6fcda53578.camel@j-davis.com |
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| Lists: | pgsql-hackers |
On Fri, 2025-02-28 at 14:51 +0530, Ashutosh Bapat wrote:
> 2. We aren't restoring the statistics faithfully - as mentioned in
> Greg's reply. If users dump and restore with autovacuum turned off,
> they will be surprised to see the statistics to be different on the
> original and restored database - which may have other effects like
> change in plans.
Then let's just address that concern directly: disable updating stats
implicitly if autovacuum is off. If autovacuum is on, the user
shouldn't have an expectation of stable stats anyway. Patch attached.
Regards,
Jeff Davis
| Attachment | Content-Type | Size |
|---|---|---|
| v2-0001-During-CREATE-INDEX-don-t-update-stats-if-autovac.patch | text/x-patch | 6.8 KB |
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