一套Linux上的11.2.0.2 RAC系统，其中一个节点startup mount时出现ORA-19808错误，日志如下：
SQL> alter database mount; alter database mount * ERROR at line 1: ORA-01105: mount is incompatible with mounts by other instances ORA-19808: recovery destination parameter mismatch SQL> exit Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - 64bit Production With the Partitioning, Real Application Clusters, OLAP, Data Mining and Real Application Testing options [oracle@rh3 ~]$ oerr ora 19808 19808, 00000, "recovery destination parameter mismatch" // *Cause: The value of parameters DB_RECOVERY_FILE_DEST and // DB_RECOVERY_FILE_DEST_SIZE must be same in all instances. // instance. All databases must have same recovery destination // parameters. // *Action: Check DB_RECOVERY_FILE_DEST and DB_RECOVERY_FILE_DEST_SIZE // values in all instances. SQL> col name for a30 SQL> col value for a30 SQL> select name ,value,inst_id from gv$system_parameter where name='db_recovery_file_dest_size'; NAME VALUE INST_ID ------------------------------ ------------------------------ ---------- db_recovery_file_dest_size 0 1 db_recovery_file_dest_size 42278584320 2
该错误是由于启动节点使用了pfile形式的参数文件，而该参数文件中的db_recovery_file_dest_size值与已经启动的另一个节点的db_recovery_file_dest_size不一致所造成。 如果使用共享的server parameter file则不可能出现上述情况，当然也可以通过在启动节点上修改db_recovery_file_dest_size来解决问题。
本文转自maclean_007 51CTO博客，原文链接:http://blog.51cto.com/maclean/1277712
