Now I have the PromQL for the metrics I need. Let me check the metrics subskill for L0 files:I have the key PromQL patterns. Now I'll fetch the four required metrics for `db-tikv-9` using the clinic-cli:
- `tikv_engine_pending_compaction_bytes` (for `write` and `lock` CF)  
- `tikv_engine_num_files_at_level` where level=0 (for `write` and `lock` CF)Both metrics fetched. Now let me extract the per-CF max values from the persisted evidence:All data is in the `series_summaries`. I can read the exact values for `db-tikv-9` directly from the output:

**`db-tikv-9` — pending compaction bytes (max):**
- `write` CF: **17,669,078,025** bytes
- `lock` CF: **34,343,645** bytes

**`db-tikv-9` — L0 files (max):**
- `write` CF: **8**
- `lock` CF: **4**

```json
{
  "cluster_id": "10989049060142230334",
  "tikv_node": "db-tikv-9",
  "window": {
    "start": "2026-07-21T03:00:00Z",
    "end": "2026-07-21T03:05:00Z"
  },
  "evidence_sufficient": true,
  "signals": {
    "write_cf_pending_compaction_bytes_max": 17669078025,
    "lock_cf_pending_compaction_bytes_max": 34343645,
    "write_cf_l0_files_max": 8,
    "lock_cf_l0_files_max": 4
  }
}
```