| From: | Melanie Plageman <melanieplageman(at)gmail(dot)com> |
|---|---|
| To: | Pg Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, Andres Freund <andres(at)anarazel(dot)de>, Peter Geoghegan <pg(at)bowt(dot)ie>, David Rowley <dgrowley(at)gmail(dot)com> |
| Subject: | Re: Trigger more frequent autovacuums of heavy insert tables |
| Date: | 2024-10-23 21:21:14 |
| Message-ID: | CAAKRu_bQWDciNUXtnvpLQyMmv9Q8H+yPoe=FwcvyL=hACT5rWw@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Tue, Oct 22, 2024 at 3:12 PM Melanie Plageman
<melanieplageman(at)gmail(dot)com> wrote:
>
> The attached patch does this.
I realized that I broke relation_statistics_update(). Attached v2 is fixed.
> I've estimated the unfrozen percentage of the table by adding a new
> field to pg_class, relallfrozen, which is updated in the same places
> as relallvisible.
While my relallfrozen column correctly appears in pg_class, I noticed
that it seems like catalog/pg_class_d.h did not have my column added
(this file is auto-generated), despite my adding relallfrozen to
catalog/pg_class.h. Is there something else I have to do when adding a
new column to pg_class?
> At the end of the benchmark, the patched version of Postgres had
> emitted twice as many FPIs as master.
This was meant to say the reverse -- _master_ did twice as many FPIs
as the patch
- Melanie
| Attachment | Content-Type | Size |
|---|---|---|
| v2-0001-Add-relallfrozen-to-pg_class.patch | text/x-patch | 14.9 KB |
| v2-0002-Trigger-more-frequent-autovacuums-with-relallfroz.patch | text/x-patch | 4.2 KB |
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