![]() SQL> startup mount ORACLE instance started. In actual applications, up to 30 archiver processes can be started. In the archive log mode, the database can use all archive log files generated from the most recent database backup to ensure no data loss most production databases run in archivelog mode.Īfter the oracle database opens the archive log mode, it will automatically start a new process: the archiver ARCn. ![]() If the data file is damaged due to media failure at this time, the rewritten data will be lost when the database is restored In the non-archive log mode, the redo log will be rewritten directly when the log is switched. Only the archive mode without a corresponding backup strategy will only cause trouble.īy default, the oracle database is created in non-logging log file mode, The archive mode can improve the recoverability of the Oracle database.Īll production databases should run in this mode, and the archive mode should be combined with the corresponding backup strategy. ![]() Oracle database can run in two modes: archive mode (archivelog) and non-archive mode (noarchivelog). Is it necessary to enable log archiving when ORACLE creates a database?
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