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- {
- "type": "SQLOperator",
- "node_name": "HDFS_SCAN_NODE",
- "metric_names": [
- "AverageScannerThreadConcurrency",
- "LocalTime"
- ],
- "unit_id": 0,
- "rule": {
- "condition": "vars['IOBound']==False",
- "expr": "(8 - vars['AverageScannerThreadConcurrency']) / 8 * vars['LocalTime']",
- "message": "Speed can be improved by that much if there's 8 scanner threads",
- "label": "Lack of scanner thread parallelism",
- "prio": 2
- }
- }
|