Problems of having DR as Synchronous Commit

Question

In our always on set up we have One Primary and One Secondary as Synchronous Commit and the DR as asynchronous commit. If i want to change the DR to Synchronous Commit will there be any performance issues ?

Answer 1

If i want to change the DR to Synchronous Commit will there be any performance issues ?

Well, it will take longer to commit transactions, as the primary will wait for the log records to be saved on both sync replicas during each commit. Whether that causes a "performance issue" depends on the transaction throughput, network bandwidth, distance to the DR location, and the tolerance of the application and users for slower commits.