ORA-19812: cannot use string without DB_RECOVERY_FILE_DEST ORACLE 报错 故障修复 远程处理
文档解释
ORA-19812: cannot use string without DB_RECOVERY_FILE_DEST
Cause: There are three possible cause for this error: 1) The indicated parameter was in use when no DB_RECOVERY_FILE_DEST parameter was encountered while fetching the initialization parameter. 2) An attempt was made to set indicated the parameter with the ALTER SYSTEM command when no DB_RECOVERY_FILE_DEST was in use. 3) An attempt was made to clear DB_RECOVERY_FILE_DEST with the ALTER SYSTEM command when the indicated parameter was in use.
Action: Eliminate any incompatible parameter definitions.
ORA-19812:cannot use string without DB_RECOVERY_FILE_DEST 是一个错误文件,指的是尝试在未设置 DB_RECOVERY_FILE_DEST 环境变量时进行自动恢复操作,而此操作在无 DB_RECOVERY_FILE_DEST 的情况下是不可行的。
官方解释
本错误表明尝试在 Oracle 数据库中进行自动恢复操作,而 DB_RECOVERY_FILE_DEST 环境变量未设置或未指定正确值。如果 DB_RECOVERY_FILE_DEST 变量未设置,则无法进行自动恢复操作,将会抛出此错误。
常见案例
当使用 RMAN 备份数据库时,如果 Oracle 进程没有正确设置 DB_RECOVERY_FILE_DEST 环境变量,则在尝试备份时会抛出 ORA-19812 错误。
一般处理方法及步骤
1. 确认参数 NC_DVP_ENABLED, DB_RECOVERY_FILE_DEST 及 DB_RECOVERY_FILE_DEST_SIZE 是否正确配置,具体配置步骤可参考 Oracle 文档: Manage Automatic Undo Management with RMAN。
2. 正确设置 RMAN 备份策略及数据恢复策略,具体步骤可参考 Oracle 文档:Manage Automatic Undo Management with RMAN。
3. 使用 RMAN 全备及是否允许增量备份,可参考 Oracle 文档:Manage Automatic Undo Management with RMAN。