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From: Adrian Klaver <[email protected]>
To: Vinay Oli <[email protected]>
Cc: [email protected]
Subject: Re: Reg: Size difference
Date: Sat, 14 Sep 2024 13:16:09 -0700
Message-ID: <[email protected]> (raw)
In-Reply-To: <CACHNdrBwHwjGsBKx=4C=mHqh-qYrg+uutsK=Np+O4DSqSJtADA@mail.gmail.com>
References: <CACHNdrBT4MTTo_EGSHke+QxXwUUV40miraQwk4GR1wzsiogwnw@mail.gmail.com>
	<[email protected]>
	<CACHNdrBwHwjGsBKx=4C=mHqh-qYrg+uutsK=Np+O4DSqSJtADA@mail.gmail.com>

On 9/14/24 11:10, Vinay Oli wrote:
> Hi
> 
>   I've checked the database size by meta command \l+ and even I checked 
> from file system level du -sh 49181 folder. 49181 is the db oid.

Minimal information is not going to solve this issue.

Provide the exact output of commands from:

1) The Primary database.

2) The Standby database.

3) Per post from Laurenz Albe, any objects in 49181/ that differ in size 
between the primary and standby.

Also:

1) Describe the exact type of replication you are using?

2) The replication settings you are using.

3) The exact Postgres versions on both sides.

4) The OS and version on both sides.

5) Have you checked the Postgres logs on the standby side to see if the 
server is showing any relevant errors?


> 
> Pgwal directory is same 40gb at primary and standby servers.
> 
> All the directories are of same size,  49181 folder (oid)  is only 
> having different size.
> 
> 
> 
> Thanks,
> Vinay kumar
> 
> On Sat, Sep 14, 2024, 10:59 PM Adrian Klaver <[email protected] 
> <mailto:[email protected]>> wrote:
> 
>     On 9/14/24 10:19, Vinay Oli wrote:
>      > Hi Team
>      >
>      > I have been using PostgreSQL for the past 6 years. PostgreSQL has
>      > significantly impacted my life, providing me with great
>     opportunities
>      > for knowledge and self-development.
>      >
>      > I'm currently facing a strange issue with PostgreSQL 15.0. I have a
>      > primary-standby setup that is in sync, with a replication slot in
>     place.
>      > There are 18 databases, and one of the databases on the primary
>     side is
>      > 104 GB, while the same database on the standby side is 216 GB.
>     Both are
>      > in sync with zero delay.
> 
>     How are you measuring the size?
> 
>     If you are measuring on the files system what is the size of the base/
>     and pg_wal/ sub-directories in the %PG_DATA directoty?
> 
>      >
>      > Could this be a bug? If so, has it been resolved in newer
>     releases? If
>      > it is not a bug, how can this issue be fixed? Is there a solution
>     or any
>      > supporting documentation available?
>      >
>      > WAL and log files are being rotated properly. The issue is with a
>      > database named services_mfs. On the primary cluster, the
>     services_mfs
>      > database is 104GB, but on the standby cluster, it is 216GB, even
>     though
>      > both cluster are in sync. The standby database is only used in
>     case of a
>      > crash, which is managed by a Patroni cluster with etcd.
>      >
>      >
>      >
>      > Thanks,
>      >
>      > Vinay Kumar
>      >
>      >
>      >
> 
>     -- 
>     Adrian Klaver
>     [email protected] <mailto:[email protected]>
> 

-- 
Adrian Klaver
[email protected]

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