Shared Objects Cache and User Objects Cache Monitors

Use

Description

The Shared Objects Cache and User Objects Cache monitors enable you to view information regarding the following PCD caches:

Shared objects cache (xfs.data) : Contains PCD objects that are shared among different portal users, such as roles, pages, and iViews.
User objects cache (xfs.user) : Contains objects that store user-specific personalization data. One object exists per user at this caching level.

The Shared Objects Cache and User Objects Cache monitors are located in the Monitor Browser of SAP NetWeaver Administrator. For more information, see Activating and Viewing Portal Monitors in SAP NetWeaver Administrator .

Monitored Data

When enabled, each of the monitors shows the following information:

Monitor	Shows
Cache hits	The number of requests served by the cache.
Cache requests	The number of times an object was requested from the cache.
Evicted objects	The number of objects removed from the cache as a result of garbage collection. A high number can indicate low cache efficiency due to garbage collection being performed too frequently.
Hit ratio	The percentage of cache requests served by the cache (calculated from the ratio between cache hits and cache requests). This value is an important indicator of the cache efficiency. Under normal operating conditions, the hit ratio should be close to 100%.
Invalidated objects	The number of objects removed from the cache due to a write operation. Write operations on one cluster node lead to cache invalidations on all other cluster nodes. A high number can indicate low cache efficiency due to frequent write operations for objects that are read at runtime.
Number of cached objects	The number of objects currently held in the cache. This is an approximate number since a delay may exist between the removal of an object by garbage collection and the removal of a corresponding soft reference object that is stored in the cache.