How to fix the Oracle error ORA-16855: transport lag has exceeded specified threshold?

In this post, you’ll learn more about the Oracle ErrorORA-16855: transport lag has exceeded specified threshold with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-16855: transport lag has exceeded specified threshold

Reason for the Error ORA-16855: transport lag has exceeded specified threshold

The current transport lag exceeded the value specified by the ‘TransportLagThreshold’ database property. It is caused by either poor network performance between the redo source and the standby databases or a network disconnection.

How to fix the Error ORA-16855: transport lag has exceeded specified threshold ?

You can fix this error in Oracle by following the below steps

Check the network connection between the redo source and standby databases. If they are connected, check the network performance between the redo source and the standby databases and tune it if necessary.

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