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# Caching Realm --> Groups

Tasks Related Topics Attributes

## Overview

Use this page to configure and enable the Group 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 Group 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 127-1

Attribute Label | Description | Value Constraints
--- | --- | ---
Enable Group Cache | Enables the Group cache. By default, the Group cache is enabled. | Default: true Valid values: true false
Group Cache Size | Maximum number of Group lookups to cache. This attribute should be a prime number for best performance. | Minimum: 17 Maximum: 65537 Default: 211
Group Cache TTLPositive | Number of seconds to retain the results of a successful Group lookup. | Minimum: 1 Maximum: 2147483647 Default: 60
Group Cache TTLNegative | Number of seconds to retain the results of an unsuccessful Group lookup. | Minimum: 1 Maximum: 2147483647 Default: 10
Group Membership Cache TTL | Number of seconds to store the members of a Group before updating it. | Minimum: 1 Default: 300