What Is the Time Delay for Primary/Secondary Synchronization in a Replica Set?¶
The delay for primary/secondary synchronization cannot be calculated using a formula. The delay is affected by the following factors:
Network communication status
Transaction pressure on the primary node, that is, transactions per second (TPS) of the primary node
Transaction size executed by the primary node, that is, the duration of a transaction execution
Load of the secondary node
If the primary node bears heavy pressure within a period and executes a large number of transactions per second, the synchronization to the secondary node is delayed.
You can view Replication Lag of the secondary node on the Cloud Eye console to know the synchronization delay.