pgdisablelogerror is a PostgreSQL extension that will disable server logging for specified sql error codes.

This will allow you to omit messages for acceptable errors (for example unique key violations - 23505).

Build

make install USE_PGXS=1

Installation

Build the extension
Add pgdisablelogerror to "shared_preload_libraries" in postgresql.conf
Restart PostgreSQL to reload new shared library
Create extension in postgres database (you only need to create it under postgres database)

postgres=# CREATE EXTENSION pgdisablelogerror;

Comma separated list of sql error codes to skip logging.

Scope: System

Default: ''

Empty or NULL will disable the extension.

Add the following code to log_line_prefix: %e