postgres seems to ignore log_min_duration_statement

Hi

I want to have postgres log sql statements that take longer than 5
seconds to execute.  In postgresql.conf I have set
log_min_duration_statement as follows:

root@martin-desktop:/etc/postgresql/8.3/main# grep log_min_duration
postgresql.conf
log_min_duration_statement = 5000       # -1 is disabled, 0 logs all
statements

However, in the log files, I'm seeing entries for all SQL executed, not
just that taking 5000ms or more. For example:

2008-10-14 10:15:50 BST PID:20349 DB:vhdb LOG:  statement: select * from
vendors;
2008-10-14 10:15:50 BST PID:20349 DB:vhdb LOG:  duration: 0.259 ms
2008-10-14 10:15:50 BST PID:20349 DB:vhdb LOG:  QUERY STATISTICS
2008-10-14 10:15:50 BST PID:20349 DB:vhdb DETAIL:  ! system usage stats:
        !       0.000281 elapsed 0.000000 user 0.000000 system sec
        !       [0.004000 user 0.004000 sys total]
        !       0/0 [0/176] filesystem blocks in/out
        !       0/0 [0/923] page faults/reclaims, 0 [0] swaps
        !       0 [0] signals rcvd, 0/0 [0/0] messages rcvd/sent
        !       0/0 [8/0] voluntary/involuntary context switches
        ! buffer usage stats:
        !       Shared blocks:          0 read,          0 written,
buffer hit rate = 100.00%
        !       Local  blocks:          0 read,          0 written,
buffer hit rate = 0.00%
        !       Direct blocks:          0 read,          0 written


Am I missing something obvious?

Regards

--
Martin A. Brooks |  http://www.antibodymx.net/ | Anti-spam & anti-virus
   Consultant    |  martin@antibodymx.net      | filtering. Inoculate
 antibodymx.net  |  m: +447792493388           | your mail system.