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WEBSPHERE PORTAL V6.1 TUNING GUIDE
or direct groups to which a user belongs. The size of this cache scales with the number
of active users and the number of virtual portals they access. The cache is accessed
during login into portal, but typically not during regular portal navigation. Its main use
case is during administration of users and user groups. Entries are invalidated from this
cache during login of the user and after user and group administrative changes. Creating
a new cache entry requires queries against the WMM component and then typically
against the user repository. An entry in the cache is medium-sized.
com.ibm.wps.ac.ChildResourcesCache
Default size: 1000, default lifetime: 7200, usage pattern: regular.
This cache contains the resource hierarchy within portal access control. The size of this
cache scales with the number of protected resources accessed by the active users in the
system, like the protected resources cache. This cache does not contain leaf objects in
the access control tree, so the number of entries typically is smaller. The cache is
accessed during most portal access control requests. Entries are invalidated from this
cache during resource deletion, parent change of the resource, modification of the
resource owner, externalization, internalization, and role block change. Creating a cache
entry includes a multi-row query against the portal database. An entry in the cache is
fairly small.
com.ibm.wps.ac.ApplicationRoleOIDCache
Default size: 5000, default lifetime: 7650, usage pattern: regular.
This cache maps application role names to the corresponding object IDs. It scales with
the number of application roles defined in the system. Data is read from the cache
frequently when accessing or administering composite applications. In all other situations
the cache is basically not used at all. Entries are invalidated when application roles are
deleted. There is one entry in the cache per application role per WebSphere Portal
domain, except for the customization domain. Creating a cache entry means reading a
single row of data from the portal database. A cache entry is fairly small.
com.ibm.wps.ac.ApplicationRoleDescriptorCache
Default size: 5000, default lifetime: 8450, usage pattern: regular.
This cache maps the object ID of an application role to its corresponding descriptor
object, which contains the application name, parent application and other information.
The cache scales with the number of application roles defined in the system. Data is
read from the cache frequently when accessing or administering composite applications.
In all other situations the cache is basically not used at all. Creating a cache entry means
reading a single row of data from the portal database. A cache entry is medium-sized.