export interface IMetricsSnapshot {
  // existing process/node fields
  process_cpu_seconds_total: number;
  nodejs_active_handles_total: number;
  nodejs_active_requests_total: number;
  nodejs_heap_size_total_bytes: number;
  cpuPercentage: number;         // normalized to 0-100% of total machine
  cpuUsageText: string;
  memoryPercentage: number;
  memoryUsageBytes: number;
  memoryUsageText: string;
  // system-wide fields
  systemCpuPercent: number;
  systemMemTotalBytes: number;
  systemMemAvailableBytes: number;
  systemMemUsedBytes: number;
  systemMemUsedPercent: number;
  systemLoadAvg1: number;
  systemLoadAvg5: number;
  systemLoadAvg15: number;
}