# Important Metrics

+ Auto `GC` Progress (The `GC All Keys` phase, `GC` compaction filter disabled)
  + `TiKV` scans the data turn by turn, each turn this metrics grows from `0` to `100%`
  + Possible imprecise
  + Possible slower than `TiDB GC` period
  + Shows 0 when `TiKV GC` is inactive.
![`smart`](GCImportantMetrics2_aa_001_20221026.png)

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