postgres auto_explain : setting log_min_duration doesn't start postgres 8.4.20
With these settings, the daemon starts :

postgresql.conf
shared_preload_libraries = 'auto_explain'

With these settings, the daemon doesn't start :

postgresql.conf
shared_preload_libraries = 'auto_explain'
auto_explain.log_min_duration = 1000

It is a server with a legacy application, so we cannot upgrade PG.
I cannot find documentation of this behaviour / bug...
I put also this setting and it solved :


  custom_variable_classes = 'auto_explain'