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From: Rui DeSousa <rui@crazybean.net>
To: Pavan Kumar <pavan.dba27@gmail.com>
Cc: pgsql-admin@lists.postgresql.org
Subject: Re: postgres wal log configuration question
Date: Thu, 9 May 2019 10:16:53 -0400
Message-ID: <DF39D2B0-2FAC-47CE-AB03-959BB9012A7A@crazybean.net> (raw)
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> On May 9, 2019, at 8:32 AM, Pavan Kumar <pavan.dba27@gmail.com> wrote:
> 
>  is there anyway to control wal segment naming format.  wal segment file is not generating in sequential format.

Not really; however the file names are sequential based on the timeline and log sequence.  If you change the WAL segment size then the WAL file name sequence will change; i.e. 16MB vs 128MB WAL files will generate different sequences.

Here’s a article that covers the three parts of the filename; timeline_id, block id, and segment id:

https://paquier.xyz/postgresql-2/postgres-9-3-feature-highlight-pg_xlogdump/ <https://paquier.xyz/postgresql-2/postgres-9-3-feature-highlight-pg_xlogdump/;

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