Multiple ChoiceIntermediate 45s
Metrics cardinality explosion
Adding a high-cardinality label such as user_id or request_id to a Prometheus metric causes what?
Options
- 1Faster queries because the extra label lets the index prune the relevant time series more precisely
- 2A cardinality explosion: each unique label combination is a separate time series, blowing up memory and cost
- 3Automatic aggregation because the extra label groups related series into a far smaller combined set
- 4Better alerting because per-user series let alerts fire on the behaviour of individual users
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