Re: database lagging

From: Rui DeSousa <rui(at)crazybean(dot)net>
To: Pepe TD Vo <pepevo(at)yahoo(dot)com>
Cc: "pgsql-admin(at)lists(dot)postgresql(dot)org" <pgsql-admin(at)lists(dot)postgresql(dot)org>
Subject: Re: database lagging
Date: 2021-07-23 19:08:55
Message-ID: 34014CDE-15BC-481C-9B97-43DB5214657E@crazybean.net
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To me that looks like you have synchronous replication and the replica is behind thus your command is waiting for the alter command to be written to the replica’s WAL file. Doing a Ctrl-C terminates the waiting on synchronous replication but the command was already completed on the primary node just not replicated yet.

Can you confirm or deny the use of synchronous replication?

> On Jul 23, 2021, at 1:52 PM, Pepe TD Vo <pepevo(at)yahoo(dot)com> wrote:
>
> I am doing CIS Benchmart on Postgreql 12. After alter parameters and when I tried to create a new role. It's lagging and didn't prompt out the result, until I hit the ctl C key. Even alter role. All I needed to hit ctl C key if not, it hung there for ever. Is there a way to fix it?
>
> postgres=# create role appuser;
> ^CCancel request sent
> CREATE ROLE
>
> postgres=# ALTER ROLE appuser NOSUPERUSER;
> ^CCancel request sent
> ALTER ROLE
>
>
> postgres=# ALTER ROLE appuser NOREPLICATION;
> ^CCancel request sent
> ALTER ROLE
>
> postgres=# ALTER ROLE appuser NOCREATEROLE;
> ^CCancel request sent
> ALTER ROLE
>
> postgres=# ALTER ROLE appuser NOHERIT;
> ^CCancel request sent
> ALTER ROLE
>
>
>

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