log_filename is a configuration parameter determining the filename of log files stored on the local file system.
log_filename was added in PostgreSQL 8.0.
The default value for
The filename format is treated as a
strftime pattern, with the
%-escapes being similar to those listed in the Open Group strftime specification. Note that the local system's
strftime is not used directly, and non-standard extensions to the format are not supported. For further details on PostgreSQL's
strftime implementation, see: src/timezone/strftime.c.