I've checked PostgreSQL 9.1 and 9.2 installations and neither of them have a pg_log folder. PostgreSQL's official documentation, in the 55.1. Database File Layout section doesn't mention pg_log either.
Is this a typo, and should say pg_clog instead of pg_log?
This post has been edited by dserodio: 14 September 2012 - 09:05 AM