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# Caching Realm --> Authentication

Tasks Related Topics Attributes

## Overview

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

## Tasks

Enabling the Authentication Cache

## Related Topics

Introduction to WebLogic Security

Managing WebLogic Security

Securing WebLogic Resources

Programmimg WebLogic Security

Developing Security Providers for WebLogic Server

Securing a Production Environment

The Security topics in the WebLogic Server 8.1 Upgrade Guide

Security FAQ

The Security page in the WebLogic Server documentation

## Attributes

Table 125-1

Attribute Label | Description | Value Constraints
--- | --- | ---
Enable Authentication Cache | Enables the Authentication cache. By default, the Authentication cache is enabled. | Default: true Valid values: true false
Authentication Cache Size | Maximum number of Authentication requests to cache. This attribute should be a prime number for best lookup performance. | Minimum: 17 Maximum: 65537 Default: 211
Authentication Cache TTLPositive | Number of seconds to retain the results of a successful Authentication lookup. | Minimum: 1 Maximum: 2147483647 Default: 60
Authentication Cache TTLNegative | Number of seconds to retain the results of an unsuccessful Authentication lookup. | Minimum: 1 Maximum: 2147483647 Default: 10