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Configuration Parameters 
All logged-on users and groups are stored temporarily in an LRU buffer each.
Use the parameters below to set the size of these buffers:
· com.tssap.dtr.server.deltav.security.userBufferSize=1000
· com.tssap.dtr.server.deltav.security.groupBufferSize=1000
The UserManagementTask refreshes these buffers periodically to keep the principals in the buffers up to date. The default period is set to five minutes. This implies that changes such as password changes become effective only after this period has expired.

The UME uses its own buffers, which may be refreshed in larger intervals. This concerns changes in the group assignment.
You can change these settings in file
/system/config/active/registry/repository.properties
You use the same file to set the AclManagerTask: This task reads and refreshes the ACL definitions periodically (default is five minutes).
