Error reduction in very large groups

Some errors live for a long time, and in rare cases, you may have an error with an extremely large number of occurrences marked with this note:

This error has an extremely high number of occurrences. As a result, we are not storing every occurrence.

Further storage details

This note means that Airbrake is not storing every single occurrence. This functionality prevents error storage requirements from getting out of control, ensuring we can continue delivering fast and reliable service. We drop roughly 25% of the occurrences, using an algorithm to distribute these deletions evenly.

Total occurrence numbers

Error overview graphs will show the real number of occurrences (the number before our algorithm runs). The number shown on the occurrences section of an error and in the errors list is the actual number of error occurrences currently available to you to view (the number of occurrences available after our algorithm runs).

Errors not stored (ie: errors rejected by our algorithm) do not count towards your monthly quota usage.