Accelerating User Display by Means of
Caching 
Use
The performance of the user display – for example, on the Collaboration Launch Pad, in the room member list, or in the results list of the user search function – can be improved using an internal cache memory. The system writes all users displayed to the cache memory and reads them directly from there if the same user is displayed again.
For the user management repository manager (User Management Engine, UME), SAP delivers the following preconfigured cache memories:
Name |
Technical Name |
Description |
Small |
ca_coll_rep_ume_small |
Capacity: 5000 entries Storage period for an object: 3600 seconds |
Medium |
ca_coll_rep_ume_medium |
Capacity: 10000 entries Storage period for an object: 5200 seconds |
Large |
ca_coll_rep_ume_large |
Capacity: 15000 entries Storage period for an object: 8800 seconds |
By default, the medium-capacity cache memory (10000 entries) is activated for the user management repository. If necessary, you can change the selected cache memory or configure the active cache memory according to the requirements of your company.
Prerequisites
The System Administration portal role is assigned to your user.
Activities
The section below describes how you can display and change the cache memory assignment and the properties of the cache memory used.
Configuration of the Cache Memory Assignment
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1. To launch the configuration of the cache memory assignment, choose in the portal: System Administration ® System Configuration ® Knowledge Management ® Content Management ® Repository Managers (® Show Advanced Options) ® User Management Engine (UME 4.0) Repository Manager.
This takes you to the configuration of the UME repository manager. The configuration object ume delivered by SAP contains the assignment of the medium-capacity cache memory.
2. If you require a cache memory with lower or higher capacity, you can assign this in the field An internal cache for resources. Configuration of the assignment comprises the following properties:
Property of the Cache Memory Assignment |
Value |
Name |
Unique name of the assignment |
Description |
Optional: Assignment description |
Prefix – with preceding \ |
\ume The application recognizes this entry and therefore you must not change it. |
Active |
Activated |
ACL Manager Cache |
Default entry ca_rsrs_acl |
List Members |
Activated |
An internal cache for resources |
Technical name of the cache memory You can assign a different cache memory (see the table of possible entries above). |
Hide in Root Folder (advanced option) |
Not activated |
3. Confirm your changes by choosing OK.
Optional: Configuration of the Cache Memory
If you want to change the properties of the assigned cache memory, click the technical name of the cache memory in the configuration of the assignment (see above) or choose the link Memory Cache below See Also.
To prevent your changes being overwritten during the next update, you should copy the object to be changed and change the copy. In this case, make sure that the technical name of the copy is assigned to the UME repository manager (see above).
Configure the properties of the cache memory. The configuration of a cache memory includes the following properties:
Cache Memory Property |
Description |
Restart lifetime on access |
Updates the timestamp for the object each time that it is called up from the cache memory. |
Capacity |
Capacity of the memory expressed as the number of entries |
Default Time-to-Live (0=infinite) |
Default storage period for an object in the memory. |
Singleton (advanced option) |
Activated |
Assumed entry size (advanced option) |
Estimated memory size in bytes, |
Max Cache Size (0=unlimited) |
Maximum memory size in bytes |
Max Entry Size (0=unlimited) |
Maximum number of entries |