Promstat, a CLI tool to analyse exporters
summary
A small CLI called promstat parses a Prometheus-style metric dump (from an exporter or an OpenTelemetry collector) and prints concrete diagnostics: counts of unique label values, most frequent key:value pairs, and the top 10 metrics by label count so you can spot high-cardinality hot spots. It reads a text matrix file, outputs stats and value listings, and helps locate cardinality explosions without spinning up Prometheus or TSDB.
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