> For the complete documentation index, see [llms.txt](https://docs.datasentinel.io/manual/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.datasentinel.io/manual/getting-started/postgresql-clusters/extensions/pg_buffercache.md).

# pg\_buffercache

pg\_buffercache is a PostgreSQL contrib module offering a real-time method for inspecting activities within the shared buffer cache.

Refer to the [Documentation](https://www.postgresql.org/docs/current/pgbuffercache.html) for more information

## **About**

{% hint style="info" %}
This extension is **OPTIONAL.**\
Datasentinel will automatically consider it if it is installed
{% endhint %}

{% hint style="warning" %}
To be installed in every existing database.
{% endhint %}

Once installed, you gain immediate access to shared buffer contents for either the entire cluster or a chosen database.

This is facilitated in real-time through the [Live360 module](/manual/features/key-features/live360.md#cache-usage) within Datasentinel.


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