mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-14 19:45:11 +00:00
42 lines
2.0 KiB
Markdown
42 lines
2.0 KiB
Markdown
|
---
|
|||
|
|
machine_translated: true
|
|||
|
|
machine_translated_rev: 5decc73b5dc60054f19087d3690c4eb99446a6c3
|
|||
|
|
---
|
|||
|
|
|
|||
|
|
# 系统。asynchronous\_metrics {#system_tables-asynchronous_metrics}
|
|||
|
|
|
|||
|
|
包含在后台定期计算的指标。 例如，在使用的RAM量。
|
|||
|
|
|
|||
|
|
列:
|
|||
|
|
|
|||
|
|
- `metric` ([字符串](../../sql-reference/data-types/string.md)) — Metric name.
|
|||
|
|
- `value` ([Float64](../../sql-reference/data-types/float.md)) — Metric value.
|
|||
|
|
|
|||
|
|
**示例**
|
|||
|
|
|
|||
|
|
``` sql
|
|||
|
|
SELECT * FROM system.asynchronous_metrics LIMIT 10
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
``` text
|
|||
|
|
┌─metric──────────────────────────────────┬──────value─┐
|
|||
|
|
│ jemalloc.background_thread.run_interval │ 0 │
|
|||
|
|
│ jemalloc.background_thread.num_runs │ 0 │
|
|||
|
|
│ jemalloc.background_thread.num_threads │ 0 │
|
|||
|
|
│ jemalloc.retained │ 422551552 │
|
|||
|
|
│ jemalloc.mapped │ 1682989056 │
|
|||
|
|
│ jemalloc.resident │ 1656446976 │
|
|||
|
|
│ jemalloc.metadata_thp │ 0 │
|
|||
|
|
│ jemalloc.metadata │ 10226856 │
|
|||
|
|
│ UncompressedCacheCells │ 0 │
|
|||
|
|
│ MarkCacheFiles │ 0 │
|
|||
|
|
└─────────────────────────────────────────┴────────────┘
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
**另请参阅**
|
|||
|
|
|
|||
|
|
- [监测](../../operations/monitoring.md) — Base concepts of ClickHouse monitoring.
|
|||
|
|
- [系统。指标](../../operations/system-tables/metrics.md#system_tables-metrics) — Contains instantly calculated metrics.
|
|||
|
|
- [系统。活动](../../operations/system-tables/events.md#system_tables-events) — Contains a number of events that have occurred.
|
|||
|
|
- [系统。metric\_log](../../operations/system-tables/metric_log.md#system_tables-metric_log) — Contains a history of metrics values from tables `system.metrics` и `system.events`.
|