ORA-16012

      今天早上做oracle例检的时候在physical standby上发现一个ORA-16012错误，随后的就没出现了，捣腾了半天也没发现什么异常。主备库的最大SEQUENCE#相等，没有日志丢失，所有redo都applied，比较郁闷。只有留待以后处理了。此错误在Oracle 10G Error Messages上是如此描述的：
      ORA-16012: Archive log standby database identifier mismatch.

      Cause: The database identifiers of the Primary and Standby database do not match. Remote archival of redo log files is not allowed to incompatible STANDBY database instances.

      Action: Take the necessary steps to create the required compatible STANDBY database before retrying the ARCHIVE LOG processing.