log_temp_files (integer), tuning work_mem

log_temp_files (integer)
Controls logging of temporary file names and sizes. Temporary files can be
created for sorts, hashes, and temporary query results. A log entry is made
for each temporary file when it is deleted. A value of zero logs all
temporary file information

so I've set this to;

log_temp_files = 0 # log temporary files equal or
larger

Reloaded the config and still have not seen a creation or deletion of a log
file. Is this still valid in 9.3 and do I need to change anything else?

I've got duration queries spitting out;

2014-11-05 12:11:32 PST rvtempdb postgres [local] 31338 2014-11-05
12:11:32.257 PSTLOG: duration: 1609.707 ms statement: COPY adgroups
(adgroup_id, name, status, campaign_id, create_date, modify_date) FROM
stdin;

So logging is working.

I'm set to info ;

log_min_messages = info

So what would be the cause of not seeing anything ,and how can one turn
work_mem without seeing these entries?

Thanks!
Tory