Reference information about using WSRP with the portal includes
WSRP markup caching and Known limitations.
WSRP Markup Caching
The WSRP implementation in the portal uses
expiry-based
markup caching for remote portlets to improve performance. This reduces
the number of interactions between the Consumer and the Producer and
enables the use of remote caches for pages containing remote portlets.
You can disable this feature if required.
WSRP two-phase rendering
The WSRP Consumer and the WSRP Producer in the portal support
two-phase rendering for JSR 286 portlets. This allows a remote portlet
to set headers and cookies and to modify the HTML head section. The
WSRP Producer determines whether a JSR 286 portlet requires two-phase
rendering and, if it does, the Producer invokes the render method
in two phases.