为什么Go自带的日志默认输出到os.Stderr? - 知乎 https://www.zhihu.com/question/67629357 Note that the Go runtime writes to standard error for panics and crashes; closing Stderr may cause those messages to go elsewhere, perhaps to a file opened later. os - The Go Prog
改变闪回日志位置的步骤: A.Change the value of the DB_RECOVERY_FILE_DEST initialization parameter to a new value.B.Shutdown the instance.C.Start the instance and mount the database.D.Execute the ALTER DATABASE FLASHBACK OFF command.E.Execute the ALTER DATABASE F