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promtool: Display aggregated contribution of top-N metric names

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Print the total disk usage and percentage contributed by the top-N
metric names in the disk usage analysis output. This helps users quickly
assess how much of the storage is dominated by the most significant
metrics.

Co-authored-by: Istvan Zoltan Ballok <istvan.zoltan.ballok@sap.com>
Signed-off-by: Victor Herrero Otal <victor.herrero.otal@sap.com>
This commit is contained in:
Victor Herrero Otal 2025-05-15 19:16:05 +02:00
parent c2706d5914
commit ea87698892
1 changed files with 9 additions and 0 deletions
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9
cmd/promtool/tsdb.go
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@ -937,12 +937,21 @@ func displayDiskUsage(data map[string]uint64, total uint64) {
})
fmt.Printf("Top %d metric names by disk usage:\n", n)
var sum uint64
for i := range sorted[:n] {
sum += sorted[i].v
var percent float64
if total > 0 {
percent = float64(sorted[i].v) / float64(total) * 100
}
fmt.Printf("%12d bytes (%6.2f%%) %s\n", sorted[i].v, percent, sorted[i].k)
}
var topPercent float64
if total > 0 {
topPercent = float64(sum) / float64(total) * 100
}
fmt.Printf(" total (top %8d): %12d bytes (%.2f%%)\n", n, sum, topPercent)
fmt.Printf(" total (all %8d): %12d bytes\n", len(data), total)
}