IBM 6.1.X Wsrp.cache.servicedescription, Wsrp.cache.portlet.instance, Wsrp.cache.producer.user

wsrp.cache.servicedescription

Default size: 150, default lifetime: infinite, usage pattern: regular

This cache contains service descriptions of WSRP producers. It is used on the consumer side. It scales with the number of WSRP producers integrated into the consuming portals; there is exactly one description per producer. The service description is generated using all the portlet descriptions from the producer portal plus some additional data. Hence a service description can be large in terms of memory requirements. Rebuilding the description requires several roundtrips and is an expensive operation. Cache entries are rebuilt if a user clicks the ‘Browse’ button in the WSRP administration portlets. This leads to a refresh of all service descriptions of all producers. This cache is only used during WSRP administration.

wsrp.cache.portlet.instance

Default size: 2500, default lifetime: 3600, usage pattern: regular.

This cache contains the proxy portlet instances on the WSRP consumer side and is only used there. It scales with the number of integrated remote portlets multiplied with the number of users having their own customizations of portlet preferences for these remote portlets (portlet settings for legacy portlets respectively). Creating an entry for the cache involves one multi-line database query. The size of a cached entry depends on the number of parameters associated with the portlet. Hence the size ranges from small to fairly large.

wsrp.cache.producer.user

Default size: 5000, default lifetime: 3600, usage pattern: multiple object types.

This cache contains the descriptor of the producer and context information between users and producers. It is used on the consumer side. It scales with the total number of active users accessing remote portlets of these producers, i.e. as a maximum the number of producers multiplied with the number of active users accessing them plus the number of producers. Recreating cache entry is fairly expensive. It involves some DB queries and in-memory operations. Therefore the session timeout should not be higher than the lifetime of entries in the cache. Cache entries are explicitly invalidated during user session destruction.

wsrp.cache.portlet.window

Default size: 2500, default lifetime: infinite, usage pattern: regular.

This cache contains a WSRP specific wrapper on a WebSphere Portal portlet entity object. It is used on the producer side. It scales with the number of provided portlets and the number of occurrences of these portlets on consumer pages. Recreating cache entries is rather cheap and typically only includes in-memory operations. An entry into this cache is fairly small. This cache is accessed very during a request.

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W E BS P HE R E P O R T AL V 6 . 1 T U N I N G G U I D E