Edge Computing Monitoring
Cloudflare Workers run at the edge in 300+ data centers worldwide. This distribution makes them fast but also harder to monitor—an issue in one PoP might not affect others. Multi-region monitoring is essential for catching localized failures.
CPU Time Limits
Workers have strict CPU time limits (10ms on Free, 30ms on Bundled, 30s on Unbound). If your Worker exceeds these limits, Cloudflare terminates the request. Monitor response times and watch for sudden increases that indicate you're approaching limits.
Compute-Heavy Workers
Workers that process images, run crypto operations, or parse large JSON payloads are most at risk of hitting CPU limits. Monitor these with tight response-time thresholds.
Subrequest Limits
Workers can make up to 50 subrequests (or 1000 on Unbound). If your Worker chains multiple API calls, monitor for failures caused by hitting subrequest limits.
Monitoring a Commercial SaaS?
FourSight includes 25 commercial-safe monitors with multi-region validation.
Start Monitoring FreeKV and Durable Objects Monitoring
Cloudflare KV is eventually consistent with a propagation delay of up to 60 seconds. If your app relies on KV for feature flags or configuration, monitor that critical values are present and correct using keyword checks.
Pages Deployment Monitoring
Cloudflare Pages deploys are fast but can fail silently. Monitor your Pages URLs after deployment to verify content is correct and functions are working. Use keyword monitoring to check for expected page content rather than just HTTP 200 status.
Worker Routes and Custom Domains
Misconfigured Worker routes can cause requests to bypass your Worker entirely or route to the wrong Worker. Monitor both your Worker's direct URL and any custom domains to ensure routing is correct across all paths.