Re: Why doesn't autovacuum/analyze run in due time after calling pg_stat_reset?

On 8/20/23 22:31, Rihad wrote:
> On 8/21/23 00:15, Adrian Klaver wrote:
>> On 8/20/23 12:10, Rihad wrote:
>>> On 8/20/23 20:22, Adrian Klaver wrote:
>>>> On 8/18/23 22:35, Rihad wrote:
>>>>> On 8/17/23 13:01, rihad wrote:
>>>>>>

>>
>> Hard to say without seeing the actual settings in postgresql.conf that 
>> match:
>>
>> https://www.postgresql.org/docs/current/runtime-config-autovacuum.html#GUC-AUTOVACUUM-VACUUM-SCALE-FACTOR
>>
>>
>> Most importantly:
>>
>> autovacuum
>>
>> and
>>
>> track_counts
>>
>> https://www.postgresql.org/docs/current/runtime-config-statistics.html#GUC-TRACK-COUNTS
>>
> 
> They are both on and set as per default. Autovac/analyze continue 
> running on some tables after pg_stat_reset. Just not on all of them, 
> even thought they should judging by live/dead tuples calculation.
> 
> 
> foo=> show track_counts;
> track_counts
> --------------
> on
> (1 row)
> 
> foo=> show autovacuum;
> autovacuum
> ------------
> on
> (1 row)

How about the rest of the settings at?:

https://www.postgresql.org/docs/current/runtime-config-autovacuum.html

Have the storage parameters for the tables been changed per?:

https://www.postgresql.org/docs/current/sql-createtable.html#SQL-CREATETABLE-STORAGE-PARAMETERS

In psql you can do:

\d+ <table_name>

The setting if changed will show up as Options: <setting>

Also are there include directives in use per?:

https://www.postgresql.org/docs/current/config-setting.html#CONFIG-INCLUDES

You can see by looking at the sourcefile field in pg_settings:

https://www.postgresql.org/docs/current/view-pg-settings.html

> 
> 
>>>
>>>
>>>>
>>>>>
>>>>> There are still many tables waiting for their turn, which is long due.
>>>>>
>>>>> Although there are some tables having only 60-70 (not 60-70K) 
>>>>> n_live_tup that have had autovacuum run on them. Weird.
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>
>>
> 

-- 
Adrian Klaver
adrian.klaver@aklaver.com