Cannot get log_min_duration_statement to work

Question

I have been googling for more than 2 hours, but I am really stuck with this one.
I want PostgreSQL (I am using version 8.4 on Debian) to start logging slow queries only.

Answer 1

Should be:

log_destination = 'csvlog'
logging_collector = on
log_min_duration_statement = 1000
log_line_prefix = '%t %p %r %d %u '### more context
log_statement = 'ddl' ### log schema changes