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system.asynchronous_metrics

包含在后台定期计算的指标。 例如,在使用的RAM量。

列:

示例

  1. SELECT * FROM system.asynchronous_metrics LIMIT 10
  1. ┌─metric──────────────────────────────────┬──────value─┐
  2. jemalloc.background_thread.run_interval 0
  3. jemalloc.background_thread.num_runs 0
  4. jemalloc.background_thread.num_threads 0
  5. jemalloc.retained 422551552
  6. jemalloc.mapped 1682989056
  7. jemalloc.resident 1656446976
  8. jemalloc.metadata_thp 0
  9. jemalloc.metadata 10226856
  10. UncompressedCacheCells 0
  11. MarkCacheFiles 0
  12. └─────────────────────────────────────────┴────────────┘

另请参阅
- 监测 — ClickHouse监控的基本概念。
- 系统。指标 — 包含即时计算的指标。
- 系统。活动 — 包含出现的事件的次数。
- 系统。metric_log — 包含system.metricssystem.events表中的指标的历史值。