Re: Autovacuum/Analyze Doesn't seem to be running properly - Mailing list pgsql-admin

From Alvaro Herrera
Subject Re: Autovacuum/Analyze Doesn't seem to be running properly
Date
Msg-id 20200304205256.GA22843@alvherre.pgsql
Whole thread Raw
In response to Re: Autovacuum/Analyze Doesn't seem to be running properly  (Chris Kim <christopherkim22@gmail.com>)
Responses Re: Autovacuum/Analyze Doesn't seem to be running properly
List pgsql-admin
On 2020-Mar-04, Chris Kim wrote:

> In my testing it looks like pg_stat_reset was ran, but I haven't been able
> to verify this from my logs.
> 
> Is there another way the stats could get reset?

Yes, a crash/restart does that.

> Does autovacuum use the stats from pg_stat_user_table meaning if there 50
> live tuples and 1000 dead tuples, but then the stats are reset, those dead
> tuples would never get cleaned up until there was new activity on that
> table?

That's correct.

-- 
Álvaro Herrera                https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services



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