Month: February 2026

Waiting for PostgreSQL 19 – Allow log_min_messages to be set per process type

On 9th of February 2026, Álvaro Herrera committed patch:

Allow log_min_messages to be set per process type
 
Change log_min_messages from being a single element to a comma-separated
list of type:level elements, with 'type' representing a process type,
and 'level' being a log level to use for that type of process.  The list
must also have a freestanding level specification which is used for
process types not listed, which convenientely makes the whole thing
backwards-compatible.
 
Some choices made here could be contested; for instance, we use the
process type `backend` to affect regular backends as well as dead-end
backends and the standalone backend, and `autovacuum` means both the
launcher and the workers.  I think it's largely sensible though, and it
can easily be tweaked if desired.
 
Author: Euler Taveira <euler@eulerto.com>
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Reviewed-by: Japin Li <japinli@hotmail.com>
Reviewed-by: Tan Yang <332696245@qq.com>
Discussion: https://postgr.es/m/e85c6671-1600-4112-8887-f97a8a5d07b2@app.fastmail.com

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Waiting for PostgreSQL 19 – psql: Add %i prompt escape to indicate hot standby status.

On 3rd of February 2026, Fujii Masao committed patch:

psql: Add %i prompt escape to indicate hot standby status.
 
This commit introduces a new prompt escape %i for psql, which shows
whether the connected server is operating in hot standby mode. It
expands to standby if the server reports in_hot_standby = on, and
primary otherwise.
 
This is useful for distinguishing standby servers from primary ones
at a glance, especially when working with multiple connections in
replicated environments where libpq's multi-host connection strings
are used.
 
Author: Jim Jones <jim.jones@uni-muenster.de>
Reviewed-by: Fujii Masao <masao.fujii@gmail.com>
Reviewed-by: Greg Sabino Mullane <htamfids@gmail.com>
Reviewed-by: Srinath Reddy Sadipiralla <srinath2133@gmail.com>
Reviewed-by: Nathan Bossart <nathandbossart@gmail.com>
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Reviewed-by: Andreas Karlsson <andreas@proxel.se>
Discussion: https://www.postgresql.org/message-id/flat/016f6738-f9a9-4e98-bb5a-e1e4b9591d46@uni-muenster.de

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Per-worker, and global, IO bandwidth in explain plans

Jeremy Schneider suggested a change to how plans are displayed – adding another bit of information in case we have timing information for IO for explain node. Took me a while to research, but it finally made it's way…

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