Re: temporarily disable autovacuum on a database or server ?

From: "David G(dot) Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com>
To: Melvin Davidson <melvin6925(at)gmail(dot)com>
Cc: Jonathan Vanasco <postgres(at)2xlp(dot)com>, pgsql-general general <pgsql-general(at)postgresql(dot)org>
Subject: Re: temporarily disable autovacuum on a database or server ?
Date: 2017-01-12 01:09:24
Message-ID: CAKFQuwaGqZ+Oxoy0KXU-0CcaedNwchoAmkZKYk5sEjHpCJyESQ@mail.gmail.com
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On Wed, Jan 11, 2017 at 5:50 PM, Melvin Davidson <melvin6925(at)gmail(dot)com>
wrote:

> On Wed, Jan 11, 2017 at 7:26 PM, Jonathan Vanasco <postgres(at)2xlp(dot)com>
> wrote:
>
>>
>>
> *I can't confirm this, but have you tried :*
>
> *SELECT set_config('autovacuum', 'off'', false);*
>
> *SELECT pg_reload_conf(); *
>
> *note: you must be a superuser for above*
>

I'm hoping you meant "ALTER SYSTEM" instead of "set_config()"...

​The documentation on these parameters is unclear: the only way to change
the values is to edit postgresql.conf (or on the command line) but there is
nothing said regarding whether pg_reload_conf() will work for them. I'd be
surprised if it did...

If it does - and for other cases where you can, instead of set_config you
could use "ALTER SYSTEM" and at least avoid having to manually edit the
config file. When done simply:
ALTER SYSTEM RESET autovacuum; SELECT pg_reload_conf();
to get back to normal operation.

David J.

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