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.
On Wed, 11 Jul 2018 at 6:36 pm, Ravi Krishna
<srkrishna@yahoo.com> wrote:
Are you telling that you have multiple autovac on the same table? If yes, that causes lock waits.
======================= Original Message===============
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
On Wed, 11 Jul 2018 at 5:37 pm, Ravi Krishna
Who disabled auto vacuum and why ? Basically you are paying the price for it now
Sent from my iPad
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,