Re: How can i be certain autovacuum is causing reuse if table still grows

Any key that "increases linearly over time" is a chronological key;
sequences are a perfect example.

On 7/27/20 4:38 PM, Sidney Aloisio Ferreira Pryor wrote:
>
> Thank you Ron but this table has no date column.
>
> It has one line for each page of each scanned document.
>
> ----------------------------------------------------------------------------
> *De:* Ron <ronljohnsonjr(at)gmail(dot)com>
> *Enviado:* segunda-feira, 27 de julho de 2020 18:27
> *Para:* pgsql-admin(at)lists(dot)postgresql(dot)org <pgsql-admin(at)lists(dot)postgresql(dot)org>
> *Assunto:* Re: How can i be certain autovacuum is causing reuse if table
> still grows
> Another suggestion is to partition the table by a chronological key, so
> that only a fraction of the table needs to be vacuumed.
>
> On 7/27/20 3:36 PM, Sidney Aloisio Ferreira Pryor wrote:
>> Thank you, David.
>> So can i assume that autovacuum only release dead tuples when it ends its
>> execution?
>>
>> Autovacuum is not finishing and is running for days.
>> We did not find a parameter to limit autovacuum executing time.
>> Do you have any recomendation?
>>
>> Thank you.
>> Sidney.
>> ----------------------------------------------------------------------------
>> *De:* David G. Johnston <david(dot)g(dot)johnston(at)gmail(dot)com>
>> <mailto:david(dot)g(dot)johnston(at)gmail(dot)com>
>> *Enviado:* segunda-feira, 27 de julho de 2020 17:17
>> *Para:* Sidney Aloisio Ferreira Pryor <sidney(at)tjrj(dot)jus(dot)br>
>> <mailto:sidney(at)tjrj(dot)jus(dot)br>
>> *Cc:* pgsql-admin(at)lists(dot)postgresql(dot)org
>> <mailto:pgsql-admin(at)lists(dot)postgresql(dot)org>
>> <pgsql-admin(at)lists(dot)postgresql(dot)org> <mailto:pgsql-admin(at)lists(dot)postgresql(dot)org>
>> *Assunto:* Re: How can i be certain autovacuum is causing reuse if table
>> still grows
>> On Monday, July 27, 2020, Sidney Aloisio Ferreira Pryor
>> <sidney(at)tjrj(dot)jus(dot)br <mailto:sidney(at)tjrj(dot)jus(dot)br>> wrote:
>>
>> Hi, we have a 9.6.5 postgres
>>
>> Autovacuum is set with default parameters and is running on this
>> table for days without naping or stopping.
>>
>>  3285 | -5 days -23:33:10.792166 | postgres | autovacuum: VACUUM
>> ANALYZE public.flip_pagina_edicao (to prevent wraparound)
>> (1 rows)
>>
>>
>> Its probably best avoid drawing conclusions here until the
>> anti-wraparound vacuum has completed and you’ve updated to the latest
>> minor version of PostgreSQL.
>>
>> David J.
>>
>
> --
> Angular momentum makes the world go 'round.

--
Angular momentum makes the world go 'round.