如何在节点js中使用80%的内存时发出警告？

const threshold = 0.8; // 设置内存使用阈值为80%

// 检查内存使用情况
function checkMemoryUsage() {
  const memUsage = process.memoryUsage();
  const totalHeap = memUsage.heapTotal;
  const usedHeap = memUsage.heapUsed;
  const usageRatio = usedHeap / totalHeap;

  if (usageRatio >= threshold) {
    console.warn(`Memory usage exceeded ${threshold * 100}%`);
    // 触发其他处理逻辑或发送警告通知
  }
}

// 定期检查内存使用情况
setInterval(checkMemoryUsage, 5000); // 每5秒检查一次