ClickHouse/docs/zh/database_engines/lazy.md

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2020-04-03 13:23:32 +00:00
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en_copy: true
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# Lazy {#lazy}
Keeps tables in RAM only `expiration_time_in_seconds` seconds after last access. Can be used only with \*Log tables.
Its optimized for storing many small \*Log tables, for which there is a long time interval between accesses.
## Creating a Database {#creating-a-database}
CREATE DATABASE testlazy ENGINE = Lazy(expiration_time_in_seconds);
[Original article](https://clickhouse.tech/docs/en/database_engines/lazy/) <!--hide-->