Re: Switchover - Mailing list pgsql-admin

From Rajesh Kumar
Subject Re: Switchover
Date
Msg-id CAJk5AtZCQeLtNnFm50CZG9dcQJkQzBQoKPjRXfeEamMpjrLVQw@mail.gmail.com
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In response to Re: Switchover  (Scott Ribe <scott_ribe@elevated-dev.com>)
List pgsql-admin
Can I take a small downtime and stop all applications and switchover or shall I simply switchover during low traffic time?

On Thu, 28 Dec 2023, 19:55 Scott Ribe, <scott_ribe@elevated-dev.com> wrote:
In my experience:

- Patroni switchover happens in a few seconds
- If you use pgbouncer, the client connections don't get dropped. A client that issues a query in that brief window will get an error.
- If your clients have retry logic, your users will never notice the failover.

--
Scott Ribe
scott_ribe@elevated-dev.com
https://www.linkedin.com/in/scottribe/



> On Dec 27, 2023, at 10:38 PM, Rajesh Kumar <rajeshkumar.dba09@gmail.com> wrote:
>
> Do I have to take a downtime of few mns and stop the applications and do a switchover?
>
> What happens internally when we use the command patronictl switchover? Just that the role is changed? Will it affect incoming connections?
>
> On Sat, 23 Dec 2023, 23:38 Rajesh Kumar, <rajeshkumar.dba09@gmail.com> wrote:
> Hi all,
>
>
> Any idea what prerequisite I should follow before I use the command patronictl switchover?



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