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17 lines
509 B
Markdown
17 lines
509 B
Markdown
---
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toc_priority: 31
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toc_title: "延时引擎"
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---
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# 延时引擎Lazy {#lazy}
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在距最近一次访问间隔`expiration_time_in_seconds`时间段内，将表保存在内存中，仅适用于 \*Log引擎表
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由于针对这类表的访问间隔较长，对保存大量小的 \*Log引擎表进行了优化，
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## 创建数据库 {#creating-a-database}
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CREATE DATABASE testlazy ENGINE = Lazy(expiration_time_in_seconds);
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[原始文章](https://clickhouse.tech/docs/en/database_engines/lazy/) <!--hide-->
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