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a6fb067a75
* Corrected en files * Split system-tables.md into separate files * Fixed links. * Fixed links. * Fixed links. * Fixed links. * Add ref to original article * Fixed links * Add toc_folder_title and translate * Add stack_trace.md, correct toc-title * Fixed links * Hypothesis testing * Hypothesis testing * Update run.sh, thanks @azat Co-authored-by: Anna Devyatova <annadevyatova@yandex-team.ru> Co-authored-by: Sergei Shtykov <bayonet@yandex-team.ru> Co-authored-by: alexey-milovidov <milovidov@yandex-team.ru>
2.5 KiB
2.5 KiB
system.asynchronous_metric_log
Contains the historical values for system.asynchronous_metrics, which are saved once per minute. This feature is enabled by default.
Columns:
event_date(Date) — Event date.event_time(DateTime) — Event time.name(String) — Metric name.value(Float64) — Metric value.
Example
SELECT * FROM system.asynchronous_metric_log LIMIT 10
┌─event_date─┬──────────event_time─┬─name─────────────────────────────────────┬────value─┐
│ 2020-06-22 │ 2020-06-22 06:57:30 │ jemalloc.arenas.all.pmuzzy │ 0 │
│ 2020-06-22 │ 2020-06-22 06:57:30 │ jemalloc.arenas.all.pdirty │ 4214 │
│ 2020-06-22 │ 2020-06-22 06:57:30 │ jemalloc.background_thread.run_intervals │ 0 │
│ 2020-06-22 │ 2020-06-22 06:57:30 │ jemalloc.background_thread.num_runs │ 0 │
│ 2020-06-22 │ 2020-06-22 06:57:30 │ jemalloc.retained │ 17657856 │
│ 2020-06-22 │ 2020-06-22 06:57:30 │ jemalloc.mapped │ 71471104 │
│ 2020-06-22 │ 2020-06-22 06:57:30 │ jemalloc.resident │ 61538304 │
│ 2020-06-22 │ 2020-06-22 06:57:30 │ jemalloc.metadata │ 6199264 │
│ 2020-06-22 │ 2020-06-22 06:57:30 │ jemalloc.allocated │ 38074336 │
│ 2020-06-22 │ 2020-06-22 06:57:30 │ jemalloc.epoch │ 2 │
└────────────┴─────────────────────┴──────────────────────────────────────────┴──────────┘
See Also
- system.asynchronous_metrics — Contains metrics that are calculated periodically in the background.
- system.metric_log — Contains history of metrics values from tables
system.metricsandsystem.events, periodically flushed to disk.