> # Caching Realm: Users

> Configuration Options Related Tasks Related Topics

> Use this page to configure and enable the Users cache for the Caching realm. To use the Caching realm, you need to run Compatibility security. The use of the Caching realm is deprecated in this release of WebLogic Server.

> #### Configuration Options

> Name | Description
> --- | ---
> Enable User Cache | Specifies whether the User cache should be enabled. By default, the User cache is enabled.
> User Cache Size | The maximum number of user lookups (between 17 and 65537) that should be cached. This attribute should be a prime number for best performance.
> User Cache TTLPositive | The number of seconds (between 1 and a positive 32-bit integer) to retain the results of a successful user lookup.
> User Cache TTLNegative | The number of seconds (between 1 and a positive 32-bit integer) to retain the results of an unsuccessful user lookup.

> Related Tasks

> - Enable the User cache

> Related Topics

> - Using Compatibility Security