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lib/storage: add tracker for time series metric names statistics

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This feature allows to track query requests by metric names. Tracker
state is stored in-memory, capped by 1/100 of allocated memory to the
storage. If cap exceeds, tracker rejects any new items add and instead
registers query requests for already observed metric names.

This feature is disable by default and new flag:
`-storage.trackMetricNamesStats` enables it.

  New API added to the select component:

* /api/v1/status/metric_names_stats - which returns a JSON
object
    with usage statistics.
* /admin/api/v1/status/metric_names_stats/reset - which resets internal
    state of the tracker and reset tsid/cache.

   New metrics were added for this feature:

  * vm_cache_size_bytes{type="storage/metricNamesUsageTracker"}
  * vm_cache_size{type="storage/metricNamesUsageTracker"}
  * vm_cache_size_max_bytes{type="storage/metricNamesUsageTracker"}

  Related issue:
https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4458

---------

Signed-off-by: f41gh7 <nik@victoriametrics.com>
Co-authored-by: Roman Khavronenko <roman@victoriametrics.com>
This commit is contained in:
Nikolay
2025-03-06 22:06:50 +01:00
committed by GitHub
parent 7dfaef9088
commit b85b28d30a
20 changed files with 1990 additions and 13 deletions
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2
lib/httpserver/httpserver.go
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@@ -479,7 +479,7 @@ func isProtectedByAuthFlag(path string) bool {
return strings.HasSuffix(path, "/config") || strings.HasSuffix(path, "/reload") ||
strings.HasSuffix(path, "/resetRollupResultCache") || strings.HasSuffix(path, "/delSeries") || strings.HasSuffix(path, "/delete_series") ||
strings.HasSuffix(path, "/force_merge") || strings.HasSuffix(path, "/force_flush") || strings.HasSuffix(path, "/snapshot") ||
strings.HasPrefix(path, "/snapshot/")
strings.HasPrefix(path, "/snapshot/") || strings.HasSuffix(path, "/admin/status/metric_names_stats/reset")
}
// CheckAuthFlag checks whether the given authKey is set and valid