Tune CDN and caches for dashboards

To tune CDN and caches for dashboards, set rules for what the edge handles and what stays on your network. A CDN is a network that stores public files near visitors, and a cache saves responses so you do not recompute them. These steps speed heavy views and protect private data.

Map the dashboard

• List every file and call the view needs, such as scripts, styles, images and data APIs.
• Mark each item as public or private. Public items have no personal or sensitive data.
• Group items by how often they change. Some change on deploy, others change often during the day.
• Open your browser network panel and note the largest files and the slowest calls.

Set safe cache headers

• For public static files, use long caching with versioned filenames so new deploys bust the cache.
• For any response with personal or sensitive data, mark it private or no-store so shared caches do not keep it.
• For dynamic APIs, add ETag or Last-Modified so the browser can recheck without downloading everything.
• Set correct content types and avoid caching error responses.

Use edge and origin caches

• Let the CDN cache only public assets and anonymous summaries that do not expose a person or account.
• Keep per user and per tenant queries on your own reverse proxy or application cache inside your network.
• Microcache expensive widgets at the origin for a short time to smooth spikes.
• Warm important views after a deploy so the first user sees a fast load.

Normalize cache keys

• Ignore tracking query strings in cache keys so one page view does not create many variants.
• Vary only on parameters that change the data, such as date range or dashboard id.
• Include tenant or role in private origin cache keys, and never key a shared CDN cache on user cookies.

Avoid stale data

• Version every static asset so updates roll out cleanly.
• Use conditional requests with ETag for polling panels that refresh often.
• Bypass the CDN for live connections such as WebSocket or server sent events.

What to check when done

• Reload the dashboard twice. The second load should fetch fewer files from the origin.
• Confirm headers match your plan for public and private items in the browser network panel.
• Sign in as two different users. Make sure cached panels never mix their data.
• Change a dashboard setting and confirm updates appear without a hard refresh.
• Review origin logs to see fewer duplicate requests for the same static files.

If you want help, I tune headers, CDN rules and origin caches as part of Business Automation. For assistants and automation, I also offer AI Agents & Personas and the Full Conversational AI Agent.