If you are going to be using PostgreSQL with ZFS, be sure to set: wal_init_zero = off # zero-fill new WAL files wal_recycle = off # recycle WAL files Ot

If you are going to be using PostgreSQL with ZFS, be sure to set: wal_init_zero = off # zero-fill new WAL files wal_recycle = off # recycle WAL files Otherwise, you will see some intermittent performance issues.