Google 尽管会话数较少，但仍进行分析抽样

Question

我正在使用 Google 分析报告 API，但我得到的是抽样结果，即使指定日期范围内的会话数比 500K limit 少得多。我一个月只有约 4K 节课。

我也把"samplingLevel"设为了"LARGE"。

这是 Python 查询：

    response=analytics.reports().batchGet(
  body={
    "reportRequests":[
    {
      "viewId":myViewID,
      "dateRanges":[
        {
          "startDate":"2017-05-01",
          "endDate":"2017-05-30"
        }],
    "samplingLevel":"LARGE",
      "metrics":[
        {
          "expression":"ga:sessions"
        }],
      "dimensions": [
        {
          "name":"ga:browser"

        },
        {
          "name":"ga:city",
        }
        ]
      }]
  }
).execute()

正如您在下面看到的示例 space 是 4365 个会话，远低于 500K 的限制

response.get('reports', [])[0].get('data',[]).get('samplesReadCounts',[])
Out[31]: [u'2051']

response.get('reports', [])[0].get('data',[]).get('samplingSpaceSizes',[])
Out[32]: [u'4365']

将请求分成更小的日期范围也无济于事。我使用 R 中的 GoogleAnalyticsR 库和 anti_sample=TRUE.

进行了尝试

    > web_data <- google_analytics_4(view_id, 
+                                 date_range = c("2017-05-01", "2017-05-30"),
+                                 dimensions = c("city","browser"),
+                                 metrics = c("hits"),
+                                samplingLevel="LARGE",
+                                 anti_sample = TRUE)
2017-06-04 11:54:51> anti_sample set to TRUE. Mitigating sampling via multiple API calls.
2017-06-04 11:54:51> Finding how much sampling in data request...
2017-06-04 11:54:52> Downloaded [10] rows from a total of [15].
2017-06-04 11:54:52> Data is sampled, based on 47% of sessions.
2017-06-04 11:54:52> Finding number of sessions for anti-sample calculations...
2017-06-04 11:54:53> Downloaded [30] rows from a total of [30].
2017-06-04 11:54:53> Calculated [3] batches are needed to download approx. [18] rows unsampled.
2017-06-04 11:54:53> Anti-sample call covering 14 days: 2017-05-01, 2017-05-14
2017-06-04 11:54:54> Downloaded [7] rows from a total of [7].
2017-06-04 11:54:54> Data is sampled, based on 53.2% of sessions.
2017-06-04 11:54:54> Anti-sampling failed
2017-06-04 11:54:54> Anti-sample call covering 9 days: 2017-05-15, 2017-05-23
2017-06-04 11:54:54> Downloaded [4] rows from a total of [4].
2017-06-04 11:54:54> Data is sampled, based on 55.7% of sessions.
2017-06-04 11:54:54> Anti-sampling failed
2017-06-04 11:54:54> Anti-sample call covering 7 days: 2017-05-24, 2017-05-30
2017-06-04 11:54:55> Downloaded [10] rows from a total of [10].
2017-06-04 11:54:55> Data is sampled, based on 52.3% of sessions.
2017-06-04 11:54:55> Anti-sampling failed
Joining, by = c("city", "browser")
Joining, by = c("city", "browser")
2017-06-04 11:54:55> Finished unsampled data request, total rows [13]

当我检查自定义请求中的相同数据时，我看到类似的抽样

知道为什么即使会话计数远低于限制，我也会得到抽样结果吗？

Answer 1

~~500k 适用于默认报告~~

编辑：在您用于临时查询的日期范围内，属性级别的 50 万个会话。

默认报告解释：

Analytics has a set of preconfigured, default reports listed in the left pane under Audience, Acquisition, Behavior, and Conversions.

您似乎正在使用具有次级维度的临时报告，因此 500k 阈值可能不再适用并且可能会低得多。在您最初链接到 here 的页面中有更多关于此的信息。

Answer 2

您在该视图中只有 4k 个会话...但也许该视图正在使用过滤器...通过查看没有过滤器的视图来检查您在该属性中有多少流量.... 500k 会话处于属性级别而不是视图级别。

Answer 3

尽管 https://issuetracker.google.com/issues/62525952

的会话较少，但 Google 有一张关于抽样的工单

Google 尽管会话数较少，但仍进行分析抽样

Google Analytics Sampling despite low sessions

google-analytics

google-analytics-api