| From: | Tomas Vondra <tomas(dot)vondra(at)enterprisedb(dot)com> |
|---|---|
| To: | David Steele <david(at)pgmasters(dot)net>, yuzuko <yuzukohosoya(at)gmail(dot)com>, Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>, Kyotaro Horiguchi <horikyota(dot)ntt(at)gmail(dot)com>, Justin Pryzby <pryzby(at)telsasoft(dot)com> |
| Cc: | Daniel Gustafsson <daniel(at)yesql(dot)se>, Amit Langote <amitlangote09(at)gmail(dot)com>, Masahiko Sawada <masahiko(dot)sawada(at)2ndquadrant(dot)com>, Laurenz Albe <laurenz(dot)albe(at)cybertec(dot)at>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Greg Stark <stark(at)mit(dot)edu> |
| Subject: | Re: Autovacuum on partitioned table (autoanalyze) |
| Date: | 2021-03-30 15:40:10 |
| Message-ID: | ce5c3f04-fc17-7139-fffc-037f2c981bec@enterprisedb.com |
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| Lists: | pgsql-hackers |
On 3/30/21 4:09 AM, Tomas Vondra wrote:
> Hi,
>
> ...
>
> We may need to "sync" the counts for individual relations in a couple
> places (e.g. after the worker is done with the leaf, it should propagate
> the remaining delta before resetting the values to 0). Maybe multi-level
> partitioning needs some additional handling, not sure.
>
I forgot to mention one additional thing yesterday - I wonder if we need
to do something similar after a partition is attached/detached. That can
also change the parent's statistics significantly, so maybe we should
handle all partition's rows as changes_since_analyze? Not necessarily
something this patch has to handle, but might be related.
regards
--
Tomas Vondra
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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