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Re: [Proposal] Adding Log File Capability to pg_createsubscriber

Peter Eisentraut <peter@eisentraut.org>

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From: Peter Eisentraut <peter@eisentraut.org>
To: "Hayato Kuroda (Fujitsu)" <kuroda.hayato@fujitsu.com>, Amit Kapila <amit.kapila16@gmail.com>, Gyan Sreejith <gyan.sreejith@gmail.com>
Cc: Peter Smith <smithpb2250@gmail.com>, shveta malik <shveta.malik@gmail.com>, Shlok Kyal <shlok.kyal.oss@gmail.com>, vignesh C <vignesh21@gmail.com>, Euler Taveira <euler@eulerto.com>, "pgsql-hackers@lists.postgresql.org" <pgsql-hackers@lists.postgresql.org>
Date: 2026-04-07T13:37:06Z
Lists: pgsql-hackers 
On 01.04.26 07:05, Hayato Kuroda (Fujitsu) wrote:
> Dear Peter E.,
> 
>> Instead of creating a new logging API in pg_createsubscriber locally,
>> why not extend logging.c to support a log file.
> 
> I had a concern to extend the common module. Do you have possible idea to use
> pg_logging_set_logfile() on others? I cannot, tee command on linux seems enough
> for others.

pg_upgrade was mentioned.

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

  1. pg_createsubscriber: Don't use MAXPGPATH

  2. pg_createsubscriber: Remove separate logfile_open() function

  3. pg_createsubscriber: Use logging.c log file callback

  4. Add log file support to logging.c

  5. pg_createsubscriber: Add -l/--logdir option to redirect output to files.

  6. pg_createsubscriber: Introduce module-specific logging functions.

  7. Fix another buglet in archive_waldump.c.