I am trying PITR in a test machine (same PG version 9.2.4 same O/S Ubuntu 12.04 64 bit). All archived WAL files are shipped and saved in /var/pgsql/data/archive, the latest transaction txid of them is 75666. I want to recover PG at a point of time that if XIDs are equal or smaller than '75634' so I have the following recovery.conf (only two lines):