错误日志内容

• “The error log you provided shows that the Adaptive Rate Limit Filter in AEM rejected requests to the specified URL due to exhausted server load. The log details include a server load of 674104/750000, inflight requests at 8/200, and a prediction of 85775.”
  • AEM中的自适应速率限制过滤器因为服务器负载耗尽而拒绝了对指定URL的请求。日志详细信息包括服务器负载为674104/750000，正在处理的请求（inflight requests）为8/200，以及一个预测值85775。这些数据是分析问题的关键依据。

关键指标解释

• “Server Load: This metric indicates the current usage of server resources relative to a predefined limit. In this instance, the server load approached its maximum capacity.”
  • 服务器负载（Server Load）这个指标显示了当前服务器资源使用量相对于预设限制的比例。在这个案例中，服务器负载接近了其最大容量。这意味着服务器几乎已经没有多余的资源来处理更多的请求了。
• “Inflight Requests: This reflects the number of requests being processed concurrently. The log shows this was within the acceptable range (8/200), implying the issue may lie in overall server capacity rather than concurrent requests.”
  • 正在处理的请求（Inflight Requests）反映了同时被处理的请求数量。日志显示这个数值在可接受范围内（8/200），这表明问题可能出在整体服务器容量上，而不是同时处理的请求数量上。也就是说，虽然同时处理的请求数量没有超过限制，但服务器的总负载已经接近极限了。
• “Prediction: This suggests anticipated resource usage based on current trends. A high prediction indicates potential resource exhaustion due to increased load.”
  • 预测（Prediction）是根据当前趋势预测的资源使用情况。一个高的预测值表明由于负载增加，可能会出现资源耗尽的情况。这进一步说明了服务器面临的压力和可能出现问题的趋势。

建议和参考

• “For a baseline, the recommended rate limit is 500 requests per second (rps), especially for customers unsure of the optimal value. As each site and customer have unique requirements, we do not document a strict limit. I recommend reviewing the following documentation [0], which provides guidance on using CDN logs and dashboards to determine a more accurate rate limiter value.”
  • 对于不确定最佳值的客户，推荐的速率为每秒500个请求（rps）。但由于每个网站和客户都有独特的需求，所以并没有一个严格规定的限制。https://experienceleague.adobe.com/zh-hans/docs/experience-manager-learn/cloud-service/security/blocking-dos-attack-using-traffic-filter-rules?lang=en该文档提供了如何使用CDN日志和仪表板来确定更准确的速率限制器值的指导。可以根据实际情况调整速率限制，以避免类似问题再次发生。