Grafana Performance Fix & Dashboard

Over the past few days my Grafana + Prometheus stack has begun to churn far more CPU than usual, the web UI feels sluggish, and the graphs occasionally show empty gaps. I need a seasoned Grafana / Prometheus troubleshooter to dig in, pinpoint the bottleneck, and restore smooth, complete monitoring... (Budget: $30 - $250 AUD, Jobs: Cloud Monitoring, Data Analysis, Data Visualization, Network Monitoring, Performance Tuning, System Administration, Troubleshooting, Ubuntu)