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Update merge_tree_settings.md

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fix max_delay_to_insert formula
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Denis Zhuravlev 2020-04-09 19:08:35 -03:00 committed by GitHub
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docs/ru/operations/settings/merge_tree_settings.md
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@ -69,9 +69,14 @@ ClickHouse искусственно выполняет `INSERT` дольше (д
Значение по умолчанию: 1.
Величина задержи (в миллисекундах) для `INSERT` вычисляется по формуле
`pow(max_delay_to_insert * 1000, (1 + parts_count_in_partition - parts_to_delay_insert) / (parts_to_throw_insert - parts_to_delay_insert))`
Т.е. если в партиции уже 299 кусков и parts_to_throw_insert =300, parts_to_delay_insert = 150, max_delay_to_insert = 1, `INSERT` замедлится на `pow( 1 * 1000, (1 + 299 - 150) / (300 - 150) ) = 1000` миллисекунд.
```code
max_k = parts_to_throw_insert - parts_to_delay_insert
k = 1 + parts_count_in_partition - parts_to_delay_insert
delay_milliseconds = pow(max_delay_to_insert * 1000, k / max_k)
```
Т.е. если в партиции уже 299 кусков и parts_to_throw_insert = 300, parts_to_delay_insert = 150, max_delay_to_insert = 1, `INSERT` замедлится на `pow( 1 * 1000, (1 + 299 - 150) / (300 - 150) ) = 1000` миллисекунд.