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From: Bruce Momjian <[email protected]>
To: yanliang lei <[email protected]>
Cc: [email protected] <[email protected]>
Subject: Re: about pg14 new parameter in_hot_standby
Date: Tue, 24 May 2022 19:57:26 -0400
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>

On Sun, May 22, 2022 at 11:59:15AM +0800, yanliang lei wrote:
> in the pg14 document(https://www.postgresql.org/docs/14/
> runtime-config-preset.html)
> 
> in_hot_standby parameter:
> 
> Reports whether the server is currently in hot standby mode. 
> 
> When this is on, all transactions are forced to be read-only. 
> 
> Within a session, this can change only if the server is promoted to be primary.
> See Section 27.4 for more information.
> 
> 
> "Within a session, this can change only if the server is promoted to be
> primary"--- I can not understand this statement.

It means when the server is in read/write mode, called "primary" mode vs
"standby" mode.

-- 
  Bruce Momjian  <[email protected]>        https://momjian.us
  EDB                                      https://enterprisedb.com

  Indecision is a decision.  Inaction is an action.  Mark Batterson

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