IBM WEBSPHERE 6.1.X - Manual (Page 63)

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W E B S P H E R E P O R T A L V 6 . 1 T U N I N G G U I D E
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WEBSPHERE PORTAL CACHES
In the preceding chapter we described the specific values we modified for the WebSphere
Portal caches in our environments. This chapter describes the WebSphere Portal caches,
the general parameters for those caches, which cache instances WebSphere Portal v6.1
provides, and, finally, some sample portal usage patterns along with suggestions on portal
cache properties.
General Information
With WebSphere Portal V6.1, portal configuration properties, including cache configuration
properties, are managed via the WebSphere Application Server administrative console. In
previous WebSphere Portal releases these configuration properties were maintained in
properties files. More information on how to modify portal configuration properties can be
found in the Setting configuration properties section of the WebSphere Portal Version 6.1
information center.
C A C H E C O N F I G U R A T I O N P R O P E R T I E S
The cache configuration properties are organized in two groups: global configuration
properties and cache instance specific properties. Global properties have the prefix
cacheglobal and apply to all caches unless they are specifically overridden with a cache
instance specific property. Cache instance specific properties have the prefix
cacheinstance and then contain the name of the cache instance and the name of the
property, for example:
cacheinstance.com.ibm.wps.ac.ExplicitEntitlementsCache.USER_GROUP.size
All entries of a cache are governed by a single set of properties.
The cache configuration properties that are safe to modify are: enabled, lifetime,
size, shared, replacement, and admit-threshold . The replacement and