Hi @tenekes,
Welcome to Google Cloud Community!
You can check Cloud Billing to help you track Google Cloud spending and optimize its cost.
Here’s a table where you can compare the pricing from US vs EMEA. VM-to-VM data transfer when the source and destination VMs are in different Google Cloud regions.
One possible reason is the high charges that are attributed to Internet Egress traffic, which occurs when a compute engine instance or application hosted on an instance sends requests outside to the internet. To prevent unwanted egress traffic to the internet, you can implement egress deny firewall rules.
Egress traffic rates apply only to data leaving Compute Engine or Cloud Storage. Egress charges for CDN Interconnect appear on the invoice as Compute Engine Network Egress via Carrier Peering Network.
Cloudflare's CDN only reduces costs when it can serve content from its edge servers. If a user requests content not cached by Cloudflare (a cache miss), the request goes back to your origin server (your VM in Belgium), resulting in data transfer costs. The more cache misses you have, the higher your egress costs.
- Configure Cloudflare to cache as much static content(like images, JavaScript, CSS) as possible and also set appropriate cache control headers for dynamic content. Examine your cache settings and consider adjusting them. You can set Cache Everything for some pages that don't change often. Leveraging Cloudflare's advanced features and potentially deploying your VM in a more strategic location in Europe.
I hope the information above is helpful.
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