当主库从Maximum availability模式切换到Maximum Protection模式,要更改
LOG_ARCHIVE_DEST_2,否则数据库open不了
Maximum Protection模式:
LOG_ARCHIVE_DEST_2= 'SERVICE=STANDBY VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=STANDBY LGWR SYNC AFFIRM REOPEN=10'
参数要求设置:
Redo Archival Process: LGWR
Network Tranmission mode: SYNC
Disk Write Option: AFFIRM
Standby Redo Logs: Yes
standby database type: Physical Only
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