查找主机和容器资源饱和度

SELECT
  date_trunc('hour', timestamp_utc) AS hour,
  source,
  COUNT(*) AS samples,
  AVG(cpu_utilization_pct) AS average_cpu_pct,
  MAX(cpu_utilization_pct) AS maximum_cpu_pct,
  AVG(memory_utilization_pct) AS average_memory_pct,
  MAX(memory_utilization_pct) AS maximum_memory_pct,
  MAX(disk_utilization_pct) AS maximum_disk_pct
FROM system_metrics
WHERE timestamp_utc >= now() - INTERVAL '24 hours'
  AND environment = 'production'
GROUP BY date_trunc('hour', timestamp_utc), source
HAVING COUNT(*) >= 6
  AND (
    AVG(cpu_utilization_pct) >= 80.0
    OR AVG(memory_utilization_pct) >= 85.0
    OR MAX(disk_utilization_pct) >= 90.0
  )
ORDER BY average_cpu_pct DESC, average_memory_pct DESC;