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getsentry / sentry

Developer-first error tracking and performance monitoring
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Clarify about sampling when showing Total Transactions on Stats page #55638

Open cseas opened 1 year ago

cseas commented 1 year ago

Problem Statement

We have set tracesSampleRate: 0.2 in our Sentry init config but when we check the Stats page for our project, we can see that the "Total Transactions" and "Accepted Transactions" are roughly the same number.

Does this mean that the sampling isn't working?

Solution Brainstorm

Please add a tooltip on the "Total Transactions" widget on Stats page that clarifies whether the number shown is only sampled transactions or actually all transactions before sampling.

Product Area

Stats

getsantry[bot] commented 1 year ago

Assigning to @getsentry/support for routing ⏲️

getsantry[bot] commented 1 year ago

Routing to @getsentry/product-owners-stats for triage ⏲️

Dhrumil-Sentry commented 1 year ago

Hi @cseas - Thanks a lot for this feedback. This is in our backlog. Your solution suggestion is helpful as well, I wanted to ask if you care about seeing the full breakdown of these transaction numbers.

For e.g. Do you want to see how many transactions were sampled away due to your sampling rate or any filtering in the SDK?

cseas commented 1 year ago

Do you want to see how many transactions were sampled away due to your sampling rate or any filtering in the SDK?

@Dhrumil-Sentry That'd be helpful, yes. But the immediate requirement is just to confirm whether our sampling is even working or not. The current numbers make it look like it's not. Can you confirm that the numbers shown right now are the ones after sampling?

Dhrumil-Sentry commented 1 year ago

@cseas - The stats we show in-app are the numbers Sentry is ingesting after being sampled on the client side. The total does not include transactions that are being discarded due to client-side sampling.