There is apparently some misbehavior if max_wal_size is less than 5 * wal_segment_size.
For example, if you build with --with-wal-segsize=64, then the recovery test fails unless you set max_wal_size to at least 320MB in PostgresNode.pm. The issue is that pg_basebackup fails with: pg_basebackup: could not get transaction log end position from server: ERROR: could not find any WAL files This should probably be made friendlier in some way. But it also shows that bigger WAL segment sizes are apparently not well-chartered territory lately. -- Peter Eisentraut http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services -- Sent via pgsql-hackers mailing list (email@example.com) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers