A team converts a write-heavy relational workload from Single-AZ to an RDS Multi-AZ DB instance deployment and later notices slightly higher write latency. What is the documented reason?

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B. Synchronous replication to the standby can increase write and commit latency. Amazon RDS documents that Multi-AZ DB instance deployments can have increased write and commit latency because of synchronous data replication to the standby. The standby does not serve read traffic in this deployment type, so read competition is not the cause.

A team converts a write-heavy relational workload from Single-AZ to an RDS Multi-AZ DB instance deployment and later notices slightly higher write latency. What is the documented reason?

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