Determining optimum performance settings for a four-tier environment

In a four-tier environment, site administrators must determine the needs of a typical user at the site and configure the UNLOAD_TRIGGER_CEILING and UNLOAD_TRIGGER_FLOOR preferences accordingly. To determine the optimum setting of the UNLOAD_TRIGGER_CEILING preference at your site: Determine the size of the free memory available before any Teamcenter server is started. Determine the number of users at the site accessing the server concurrently. Determine the size of the Teamcenter server instance (including all site customizations and configurations) immediately after user logon. Divide the amount of free memory available by the number of concurrent users to determine the average size of memory required for each user per session. For example, if the average size of the free memory required per user session is 100 MB, and if users typically work with assemblies containing approximately 100,000 objects, the site administrator must increase the value of the UNLOAD_TRIGGER_CEILING preference to a minimum value of 50,000 KB, based on an estimated average size for an object being 0.5 KB. Because the total size of free memory in this case is 100 MB, a value between 50,000 KB and 100,000 KB is acceptable, but it should not exceed 100,000 KB to give the optimal result for all users.