No, I have  3 sessions of autovacuum against 3 tables which is doing a Vacuum 
to prevent wraparound as it hit the limit of autovacuum_freeze_max_age of 2 
billion. I also have a vaccumdb session which is invoked by me on these tables 
which is currently in paused state. So, I want to know whether I can kill the 
autivacuum sessions which is running since 5 days and extremely slow and just 
run a manual vacuum against these tables instead. 

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  On Wed, 11 Jul 2018 at 6:36 pm, Ravi Krishna<> wrote:   
Are you telling that you have multiple autovac on the same table?  If yes, that 
causes lock waits.
======================= Original Message===============

On Jul 11, 2018, at 08:13 , Rijo Roy <> wrote:
Hi Ravi, 
It was the application teams call to disable it fearing the alteration of 
execution plans and slowness as per their explanation. I have joined 2 days 
back and I have tried educating them for enabling the same but they said after 
enough testing and evidence collected it will be enabled back in future.. As of 
now, I have started the manual vacuum operation on the databases but in one of 
them I am facing this issue that my vacuum jobs for 3 tables are paused as 
there are 3 autovacuum jobs running since 5 days on the same tables to prevent 
wraparound. Could you please confirm whether I can stop these autovacuum jobs 
so that I can run my manual run of vaccum job. 
Thanks, Rijo Roy 

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  On Wed, 11 Jul 2018 at 5:37 pm, Ravi Krishna<> wrote:   
Who disabled auto vacuum and why ?  Basically you are paying the price for it 

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On Jul 11, 2018, at 7:33 AM, Rijo Roy <> wrote:

Hi Experts, 
I am running a PG10.4 in a RHEL 6.9. The tables stored in my database are 
mainly used for reads and very less writes happen. I have recently joined this 
environment and as soon as I logged into the postgresql servers, checked for 
dead tuples and relfrozenids.. And almost all have reached the 
autovacuum_freeze_max_age of 2billion and autovacuum was disabled.. Last vacuum 
was run 3 months back. Today I got permission to vacuum the tables but for 3 
tables, Postgresql has already started the vacuum freeze using the autovacuum 
daemon running to prevent wraparound and these tables have TB'S of 
data.Experts, please confirm whether I can kill these sessions and run a manual 
vacuum job with parallel jobs. 
Thanks in advance. 
Regards, Rijo Roy 

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