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From: Ghiurea, Isabella <[email protected]>
To: Laurenz Albe <[email protected]>
To: [email protected] <[email protected]>
Subject: Re: Re: DB size  value different than  "/data"  dir size
Date: Mon, 11 Aug 2025 14:13:36 +0000
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
	<[email protected]>

I believe this is related to VACUUM FULL behavior in a streaming replication cfg ,   for the standby server the space is not been reclaimed , But the sieze of db reported with pg_pretty_db_size is identical on both db size but is  not the actual sum of /var/lib/pgsql/data1 files +dir size on the active PG were vacuum full reclaim the space.                                                                                                                                                                Is this a normal behavior  in PG with reporting incorrect db size if vacuum full has not reclaim the OS disk space on both server?

________________________________
From: Laurenz Albe <[email protected]>
Sent: Sunday, August 10, 2025 12:27:31 PM
To: Ghiurea, Isabella; [email protected]
Subject: EXT: Re: DB size value different than "/data" dir size

***Attention*** This email originated from outside of the NRC. ***Attention*** Ce courriel provient de l'extérieur du CNRC.
On Fri, 2025-08-08 at 23:17 +0000, Ghiurea, Isabella wrote:
> I am running   PGSQL version 12.3   cfg   master-slave  with  streaming replication
> and I am facing a issue in the present active Pg db.
> The database size reported from  the following : pg_size_pretty() or pg_database_size()
> or sum all of db  objects is  grater than the  sum size of  all directories/files
> reported  under /var/lib/pgsql/data1/tbl_space_name/PG_12,,,xxx/ .  ( db data tablespace)

Perhaps some part of the data is in a different tablespace, maybe pg_default.

Yours,
Laurenz Albe

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