Hi, The group of wal_init_zero and wal_recycle is WAL_SETTINGS in guc.c, but their descriptions are located in "19.6. Replication"/"19.6.1. Sending Servers" section. This seems a documentation bug. They should be located in "19.5. Write Ahead Log"/"19.5.1. Settings". Thought?
Regards, -- Fujii Masao Advanced Computing Technology Center Research and Development Headquarters NTT DATA CORPORATION