IssueTracker

Can you provide the full request with view ID (a link to query explorer would be fine). Also If you can provide the sampleSpaceSize and sampleReadSize that would be useful for debugging purposes.

I'm not sure how I can get the sampleSpaceSize and sampleReadSize. I'll have to dig deeper into the API calls.

But here's the link to the request in query explorer: https://ga-dev-tools.appspot.com/query-explorer/?start-date=2017-05-29&end-date=2017-05-29&metrics=ga%3AtotalEvents&dimensions=ga%3ApagePath&samplingLevel=HIGHER_PRECISION

The viewId is ga:88517196

The samplesReadCounts is 13839, the samplingSpaceSizes is 27550 for the previous query.

Another example...1600 session in an unfiltered view. Have seen it previously with as low as 3 sessions in the day.
https://ga-dev-tools.appspot.com/query-explorer/?ids=ga%3A75509327&start-date=2017-06-13&end-date=2017-06-13&metrics=ga%3AbounceRate%2Cga%3Aentrances%2Cga%3Apageviews%2Cga%3AuniquePageviews%2Cga%3AavgTimeOnPage%2Cga%3AexitRate&dimensions=ga%3Acountry%2Cga%3ApagePath

Web UI says "This report is based on 39.63% of sessions." for same combination. Seems to appear only with certain combinations of secondary dimensions (page vs session scope?).

Also having trouble with this on a brand new property and view.

I have a custom report and tried simplifying it as much as possible- Image attached. With that report in the Campaign view is umsampled but as soon as I click on one, with the Event Label drilldown I'm seeing around ~50% sampling on sample sizes as low as ~300.

Our automated API calls have experienced this a couple of times recently, near the end of May and then around 06/12. The most recent event involved only a couple of clients with less than ten sessions per day. We have been extracting the same set of reports with a daily granularity for dozens of clients for several years and never encountered this issue before. It would seem that something on Google's side is being tinkered with that is causing this issue. Just today I manually queried the API for the same clients/dates that threw the 'containsSampledData' flag before and it is no longer occurring. Some clear response would be much appreciated as our clients expect our data to be exact and reliable.

My API request still returns sampled data. So no "magic cure" here :-(

Is there any scheduled procedure how this problem will be processed? As I can see this ticket was "assigned" on Jun 15. What will be the next steps?

As I can see you've added a "blocked by 35602985". Unfortunately I don't have access to that ticket. So what does this mean for this issue here?

Hello, that means we are working on a solution. Once the referenced issue is fixed I will reach out to you and ask you to verify the fix before closing this issue. In the mean time you can use the normal steps to avoid sampling. Try to restate your query without segments or filters, try to avoid using intraday requests (enddate=today). Use sampleSize=LARGE. shorten the date range. etc.

Thank you for your patience,
Matt

Thank you for the update Matt.

Hi,
Same happens to us. Was using GA add-on to create auto-updated report in the spreadsheet. Sampling appears each time I add custom dimension to filter. Same report in GA UI though is not sampled.
Looking forward to your update on the issue.

Thanks a lot,
Elena

This has also happened to us and is a huge issue as our reports need to be accurate. We are way below any thresholds. For us it happens at any point more than one custom dimension is queried along one custom metric. Some standard dimensions trigger sampling as well - ga:hour does, ga:date does not. It doesn't matter how I try to manipulate the data (date ranges, segments, filters) the data was still sampled. For us this was happening across using the API via the Sheets Add-on and in the GA UI.

This began on May 17th and data was then sampled during the following time frames:
May 17th - May 30th inclusive
June 1st - June 4th
June 7th to June 22nd

Since June 22nd our reports are not showing as sampled, but I'm loathe to report this as resolved yet as it seems to be sporadic. Would like to follow this issue for updates & info.

-Kara

Just chiming in that this is affecting me as well.

Running this query through the V4 Core reporting API:
dimensions: ga:source
metrics: ga:sessions
dimensionFilters: ga:channelGrouping==Email
start_date: 2017-01-01
end_date: 2017-01-01

returns total sessions as ~12.8k
and reports that no sampling is going on (i.e. samplesReadCounts == samplingSpaceSizes)

Adding in one custom dimension, to make this query:
dimensions: ga:source, ga:dimension2
metrics: ga:sessions
dimensionFilters: ga:channelGrouping==Email
start_date: 2017-01-01
end_date: 2017-01-01

returns total sessions as ~14k
and sampling (samplesReadCounts , samplingSpaceSizes) = (42044, 75503)


Similar effect if you introduce some standard dimensions, e.g.:

dimensions: ga:hour, ga:dimension2
metrics: ga:sessions
dimensionFilters: ga:channelGrouping==Email
start_date: 2017-01-01
end_date: 2017-01-01

returns total sessions as ~12.9k
and sampling (samplesReadCounts , samplingSpaceSizes) = (42044, 75503)

Hello Matt,

is there anything new about this ticket? I've got still the problem with sampling. I do already everything to avoid sampling but without success.
Now it's been three months since I encountered the problem.

Cheers,
Martin

Martin, Cruise

Could you kindly send the exact query along with its timestamp as soon as you encounter the issue to ga-devrel@google.com. This would help us to what's going on based on our logs.

Thanks,
Ilya

The Google Analytics API Team

Hi Ilya,

I've just sent you the requested data via email.

Cheers,
Martin

Hi Ilya,

is there anything new? Do you need additional test data?

Cheers,
Martin

Hi Ilya,

I've just emailed over some sample data as requested.

Looking forward to this potentially being looked into.

Regards,

Greg (Cruise.co.uk)

Hi Ilya,

another month is over and I still get only sampled data. Is there anything new? When will I get unsampled data?

Cheers,
Martin

Agreed, we started seeing this issue mid May and most of our business' metrics rely on precise data. An ETA would be great

We have noticed this same issue.

I sent in a sample query if any additional data is needed.

Hopefully we can get this resolved soon.

Thanks,
Matthew

Hi Ilya, hi everyone

what's the current status of this bug? It seems to me that is doesn't appear anymore. Can anyone confirm this or am I just lucky?

Cheers,
Martin

Hi Ilya, hi everyone,

happy new year to everyone.

I'm still waiting for a response to this ticket. Is this issue really solved? Are you still working?

I would really appreciate any feed back.

Thanks,
Martin

Hi,
    Is this ticket still being addressed?
Thanks,
Phil

Hey all,

Multiple fixes have been introduced over the last couple months to address the issue and we are monitoring the usage. If no new verified reports arrive, we'll close the ticket soon. Also, Analytics 360 (Premium) customers can access significantly higher sampling thresholds using the new Resource Based Quota system (https://developers.google.com/analytics/devguides/reporting/core/v4/resource-based-quota). Please note, intraday (and data close to today's date) may still be subject to sampling.

Thanks,
Ilya

Greetings,

We're experiencing the same issue for the last couple of months. The unfiltered view contains less than 150k sessions per day. But when I add any custom dimension for that single day query, I'll get sampled data. Any thoughts?

@haitran.iprice If you exclude today's and yesterday's date from the report, do you still get sampled data back with a custom dimension?

Thanks,
Ilya

@Ilya Yes, I tried several queries for a single day in March, April and May this year. They all returning sampled data.

This is a query from March: https://ga-dev-tools.appspot.com/query-explorer/?start-date=2018-03-14&end-date=2018-03-14&metrics=ga%3Asessions&dimensions=ga%3AlandingContentGroup1&samplingLevel=HIGHER_PRECISION&include-empty-rows=false&start-index=1

Hi,

Do we have any update on this ticket?

Regards,
Hai

Hi Hai,

I tried to try the query that you did and it's response is not a sampled data.

It has no samplesReadCounts and samplingSpaceSizes fields.
https://developers.google.com/analytics/devguides/reporting/core/v4/basics#sampling

Here is the link of the screenshots that I did to test your query.
https://docs.google.com/document/d/1AI6zniABkqey_D5EULyYhM4SdlW_8mxj2U2X2OP5ySw/edit?usp=sharing

Thanks

Hello,

I cannot access to the screeenshots.

And the attached screenshot is my testing result (The URL is: https://www.googleapis.com/analytics/v3/data/ga?ids=ga%3A75897118&start-date=2018-03-14&end-date=2018-03-14&metrics=ga%3Asessions&dimensions=ga%3AlandingContentGroup1&samplingLevel=HIGHER_PRECISION&include-empty-rows=false&start-index=1); There are 2 fields: sampleSize: "45633", sampleSpace: "50983";

I noticed that you passing me the v4 documents; is there a differenent in term of sampling between v3 and v4?

Please advise. Thank you.