How do I resolve high latency issues in Google Cloud VPC across different regions?

All answers to this question.

To minimize inter-regional latency, the first thing you should check is your Network Service Tier. Switching from Standard to Premium Tier ensures your traffic stays on Google’s high-speed global fiber backbone for as long as possible. Additionally, implementing Global External HTTP(S) Load Balancing can help by terminating user connections at the closest Google edge location. I also recommend looking into VPC Network Peering if you are communicating between different projects. In a similar setup last year, we reduced our round-trip time by nearly 40% just by moving to the Premium Tier and optimizing our cross-region database queries.

   Answered 2025-05-16 by Deborah Miller

Have you run a trace using Network Intelligence Center to see exactly where the bottleneck is occurring? It might provide more granular data on whether the delay is in the Google network or your application logic.

   Answered 2025-05-18 by James Sullivan

• Hi James, I haven't tried the Network Intelligence Center yet, but that sounds like a great next step. I’ve mostly been looking at standard Cloud Monitoring metrics. Does the Connectivity Tests feature within that center help identify if firewall rules are adding to the overhead? I'm worried that my egress rules might be overly complex and slowing down the packet inspection process.

     Commented 2025-05-19 by Linda Harrison

You might want to consider Cloud Spanner if the latency is coming from cross-region database synchronization. It's built specifically for global consistency with low latency.

   Answered 2025-05-22 by Richard Moore

• I definitely agree with Richard. Moving to a globally distributed database like Spanner eliminates the "gravity" problem of having a database stuck in a single region while your users are everywhere.

     Commented 2025-05-23 by Deborah Miller