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DOCSUP-2956 system events show zero values setting (#16794)
* Draft * Material * Dratf is ready * + * Update docs/en/operations/settings/settings.md Co-authored-by: BayoNet <da-daos@yandex.ru> * Comments fixed * Russian translation * Final edits * Update docs/ru/operations/settings/settings.md Co-authored-by: BayoNet <da-daos@yandex.ru> * Update docs/en/operations/settings/settings.md * Update docs/ru/operations/settings/settings.md * one more adopters * Update docs/en/introduction/adopters.md * Update adopters.md Fixed the sorting order. Co-authored-by: BayoNet <da-daos@yandex.ru>
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@ -23,6 +23,7 @@ toc_title: Adopters
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| <a href="https://www.bigo.sg/" class="favicon">BIGO</a> | Video | Computing Platform | — | — | [Blog Article, August 2020](https://www.programmersought.com/article/44544895251/) |
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| <a href="https://www.bloomberg.com/" class="favicon">Bloomberg</a> | Finance, Media | Monitoring | 102 servers | — | [Slides, May 2018](https://www.slideshare.net/Altinity/http-analytics-for-6m-requests-per-second-using-clickhouse-by-alexander-bocharov) |
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| <a href="https://bloxy.info" class="favicon">Bloxy</a> | Blockchain | Analytics | — | — | [Slides in Russian, August 2018](https://github.com/ClickHouse/clickhouse-presentations/blob/master/meetup17/4_bloxy.pptx) |
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| <a href="https://www.bytedance.com" class="favicon">Bytedance</a> | Social platforms | — | — | — | [The ClickHouse Meetup East, October 2020](https://www.youtube.com/watch?v=ckChUkC3Pns) |
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| <a href="https://cardsmobile.ru/" class="favicon">CardsMobile</a> | Finance | Analytics | — | — | [VC.ru](https://vc.ru/s/cardsmobile/143449-rukovoditel-gruppy-analiza-dannyh) |
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| <a href="https://carto.com/" class="favicon">CARTO</a> | Business Intelligence | Geo analytics | — | — | [Geospatial processing with ClickHouse](https://carto.com/blog/geospatial-processing-with-clickhouse/) |
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| <a href="http://public.web.cern.ch/public/" class="favicon">CERN</a> | Research | Experiment | — | — | [Press release, April 2012](https://www.yandex.com/company/press_center/press_releases/2012/2012-04-10/) |
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@ -2293,6 +2293,47 @@ Result:
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└─────────────────────────┴─────────┘
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```
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## system_events_show_zero_values {#system_events_show_zero_values}
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Allows to select zero-valued events from [`system.events`](../../operations/system-tables/events.md).
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Some monitoring systems require passing all the metrics values to them for each checkpoint, even if the metric value is zero.
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Possible values:
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- 0 — Disabled.
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- 1 — Enabled.
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Default value: `0`.
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**Examples**
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Query
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```sql
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SELECT * FROM system.events WHERE event='QueryMemoryLimitExceeded';
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```
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Result
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```text
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Ok.
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```
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Query
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```sql
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SET system_events_show_zero_values = 1;
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SELECT * FROM system.events WHERE event='QueryMemoryLimitExceeded';
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```
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Result
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```text
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┌─event────────────────────┬─value─┬─description───────────────────────────────────────────┐
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│ QueryMemoryLimitExceeded │ 0 │ Number of times when memory limit exceeded for query. │
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└──────────────────────────┴───────┴───────────────────────────────────────────────────────┘
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```
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## allow_experimental_bigint_types {#allow_experimental_bigint_types}
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Enables or disables integer values exceeding the range that is supported by the int data type.
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@ -2099,6 +2099,48 @@ SELECT TOP 3 name, value FROM system.settings;
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└─────────────────────────┴─────────┘
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```
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## system_events_show_zero_values {#system_events_show_zero_values}
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Позволяет выбрать события с нулевыми значениями из таблицы [`system.events`](../../operations/system-tables/events.md).
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В некоторые системы мониторинга вам нужно передать значения всех измерений (для каждой контрольной точки), даже если в результате — "0".
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Возможные значения:
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- 0 — настройка отключена — вы получите все события.
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- 1 — настройка включена — вы сможете отсортировать события по нулевым и остальным значениям.
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Значение по умолчанию: `0`.
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**Примеры**
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Запрос
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```sql
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SELECT * FROM system.events WHERE event='QueryMemoryLimitExceeded';
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```
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Результат
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```text
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Ok.
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```
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Запрос
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```sql
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SET system_events_show_zero_values = 1;
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SELECT * FROM system.events WHERE event='QueryMemoryLimitExceeded';
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```
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Результат
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```text
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┌─event────────────────────┬─value─┬─description───────────────────────────────────────────┐
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│ QueryMemoryLimitExceeded │ 0 │ Number of times when memory limit exceeded for query. │
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└──────────────────────────┴───────┴───────────────────────────────────────────────────────┘
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```
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## allow_experimental_bigint_types {#allow_experimental_bigint_types}
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Включает или отключает поддержку целочисленных значений, превышающих максимальное значение, допустимое для типа `int`.
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