ORA-16858: last communication time from redo source could not be determined
Cause: The standby database had never been contacted by the redo source.
Action: Ensure that there is network connectivity between the redo source and standby databases, and the redo source is working properly.
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ORA-16858是一个由Oracle数据库引擎给出的错误,当它试图从重做源复制数据时就会发生。这个错误表明重做源无法获取或检索上次通信时间。
1.检查重做源,以确定可能的延迟原因,以及重写源可能需要的操作系统、硬件或应用程序设置。
2.改善影响重新源性能的因素,例如释放锁定冲突或改善I/O性能。
3.重新启动重写源。
4.检查重写源状态,确保对重写源数据流的正常进度,避免延迟警告及ORA-16858错误。