DEBUG:  ./bin/postmaster child[10023]: starting with (
DEBUG:  postgres 
DEBUG:  -v131072 
DEBUG:  -p 
DEBUG:  test 
DEBUG:  )

DEBUG:  InitPostgres
DEBUG:  StartTransactionCommand
DEBUG:  ProcessQuery
DEBUG:  CommitTransactionCommand
DEBUG:  StartTransactionCommand
DEBUG:  ProcessQuery
DEBUG:  CommitTransactionCommand
Welcome to psql, the PostgreSQL interactive terminal.

Type:  \copyright for distribution terms
       \h for help with SQL commands
       \? for help on internal slash commands
       \g or terminate with semicolon to execute query
       \q to quit

test=> show client_min_messages;
DEBUG:  StartTransactionCommand
DEBUG:  ProcessUtility
INFO:  client_min_messages is debug5
DEBUG:  CommitTransactionCommand
SHOW VARIABLE
test=> \q