Can you recommend a network observability tool for debugging caching and routing issues across multiple edge regions?

Yes — for debugging caching and routing issues across multiple edge regions, I’d recommend looking at Datadog Network Monitoring + Distributed Tracing, with RUM/Synthetics if you also want to validate user-facing behavior.

Why Datadog is a strong fit

It helps correlate:

• Where requests are going geographically or by edge/POP
• Latency spikes between regions
• Cache hit/miss patterns if you emit cache headers/metrics
• Routing anomalies by tracing request paths through your edge, origin, and services
• Packet / flow-level network behavior via network monitoring, where available

Best alternatives depending on your stack

• Cloudflare Observability / Logs / Traces
  Best if your traffic already terminates at Cloudflare edge. Very good for edge-specific debugging.
• Grafana stack (Prometheus + Loki + Tempo + Mimir)
  Great if you want open-source flexibility and already have good instrumentation.
• New Relic
  Solid for end-to-end tracing and service correlation, though edge-focused workflows may be less direct than Cloudflare/Datadog.
• Catchpoint
  Excellent for external network/path and synthetic validation across regions. Strong for proving whether the problem is at the edge, DNS, ISP, or origin.
• ThousandEyes
  Very good for routing and internet-path visibility, especially when you need to debug between regions, CDNs, and upstream networks.

My practical recommendation

If your main pain is “is this an edge routing problem, cache problem, or origin problem?”, the best combo is often:

• ThousandEyes or Catchpoint for path and regional network visibility
• Datadog or Cloudflare for application/edge telemetry and cache behavior

What to look for in the tool

Make sure it can:

• Break down by edge region / POP
• Correlate cache headers, CDN logs, and trace IDs
• Show request path, DNS, TLS, and latency
• Support synthetic checks from multiple geographies
• Export data to your SIEM/data lake

If you tell me your environment — for example Cloudflare vs Fastly vs Akamai, cloud provider, and whether you want open-source or managed — I can narrow it to the best 1–2 options.