Units augment metric values by giving meaning to what otherwise might be abstract numbers. Adding units also allows Sentry to offer controls - unit conversions, filters, and so on - based on those units. For values that are unitless, you can supply an empty string or none.
nanosecondmicrosecondmillisecondsecondminutehourdayweek
bitbytekilobytekibibytemegabytemebibytegigabytegibibyteterabytetebibytepetabytepebibyteexabyteexbibyte
ratiopercent
For more details about supported units, see our event ingestion documentation.