ClickHouse/docs/en/engines/database-engines/lazy.md

---
slug: /en/engines/database-engines/lazy
sidebar_label: Lazy
sidebar_position: 20
---

# Lazy

Keeps tables in RAM only `expiration_time_in_seconds` seconds after last access. Can be used only with \*Log tables.

It’s 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.com/docs/en/database_engines/lazy/) <!--hide-->
-												Get rid of toc_en.yml (#10023)


											
										
										
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+								slug: /en/engines/database-engines/lazy
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+								sidebar_label: Lazy
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-												Get rid of toc_en.yml (#10023)


											
										
										
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+								# Lazy
-												docs

											
										
										
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-												Update lazy.md
											
										
										
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+								Keeps tables in RAM only `expiration_time_in_seconds` seconds after last access. Can be used only with \*Log tables.
-												docs

											
										
										
											2019-10-08 08:31:12 +00:00
-												Normalization for en markdown (#9763)


											
										
										
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+								It’s optimized for storing many small \*Log tables, for which there is a long time interval between accesses.
-												docs

											
										
										
											2019-10-08 08:31:12 +00:00
-												Normalization for en markdown (#9763)


											
										
										
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+								## Creating a Database {#creating-a-database}
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* replace exit with assert in test_single_page

* improve save_raw_single_page docs option

* More grammar fixes

* "Built from" link in new tab

* fix mistype

* Example of include in docs

* add anchor to meeting form

* Draft of translation helper

* WIP on translation helper

* Replace some fa docs content with machine translation

* add normalize-en-markdown.sh

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* admonition support

* normalize

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* lightly edited machine translation of introdpection.md

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* add requirements.txt

* [experimental] add es docs language as machine translated draft

* remove duplicate script

* Back to wider tab-stop (narrow renders not so well)
											
										
										
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+								    CREATE DATABASE testlazy ENGINE = Lazy(expiration_time_in_seconds);
-												fix

											
										
										
											2019-10-09 19:19:50 +00:00
-												find . -type f -name '*.md'| xargs -I{} perl -pi -e 's|https://clickhouse.tech|https://clickhouse.com|g' {}

											
										
										
											2021-09-19 20:05:54 +00:00
+								[Original article](https://clickhouse.com/docs/en/database_engines/lazy/) <!--hide-->