CPU Usage Query
rate(cpu_usage_percent[5m]) * 100
cpu_usage_percent{instance="web-01"} 45.23
cpu_usage_percent{instance="web-02"} 42.18
cpu_usage_percent{instance="db-01"} 67.89
HTTP Request Rate
sum(rate(http_requests_total[5m])) by (status_code)
{status_code="200"} 1247
{status_code="404"} 23
{status_code="500"} 2
Memory Usage Trend
memory_usage_bytes / memory_total_bytes * 100
memory_usage_percent{instance="web-01"} 67.45
memory_usage_percent{instance="web-02"} 71.23
memory_usage_percent{instance="db-01"} 82.67
Error Rate Alert
rate(http_requests_total{status_code=~"5.."}[5m]) / rate(http_requests_total[5m]) * 100 > 1
ALERTS{alertname="HighErrorRate", severity="warning"} 1
⚠️ Alert triggered: Error rate above 1%