遥测采样不会影响错误/故障 [英] Telemetry sampling without affecting the errors/failures

问题描述

我想在应用洞察中记录成功通话的百分比。我发现了一篇关于遥测的文章，我认为固定费率抽样在这里是合适的。但这是否同样影响所有日志记录？是否会记录一些错误/失败？

I want to log a percentage of the success calls in app insights. I came across a post about telemetry and I think Fixed-rate sampling is appropriate here. But does this affect all logging equally? Will some errors/failures no longer be logged?

我正在寻找一个记录成功调用百分比的解决方案，但保留所有失败的请求/错误。

I am looking for a solution that logs a percentage of the success calls, but keeps all failed requests/errors.

推荐答案

您仍然可以利用默认情况下启用的自适应采样，只需进行两项小修改：

You can still leverage adaptive sampling that is enabled by default with two small modifications:

- 将"异常"添加到自适应采样的
排除类型（在两个条目中）：

- Add `Exception` to the excluded types of the adaptive sampling (in both entries):

<ExcludedTypes>Exception</ExcludedTypes>

- 添加
遥测初始化器，将成功假的请求遥测项目的采样率设置为100：

- Add Telemetry Initializer that sets sampling rate for Request Telemetry items with success false to 100:

        public void Initialize(ITelemetry telemetry)
        {
            if (telemetry is RequestTelemetry request && telemetry is ISupportSampling supportSampling)
            {
                if (request.Success == false)
                {
                    supportSampling.SamplingPercentage = 100;
                }
            }
        }

有了这个，您可以为除例外之外的所有内容启用自适应采样（特别排除） ）和失败的请求（初始化器将采样率设置为100％，以确保自适应采样不接触那些）。

这篇关于遥测采样不会影响错误/故障的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！