This parameter mandates that any database larger than the specified size will be opened without using the file system cache.
Note that this can be enabled dynamically on the Domino console, with no need to restart. While this circumvents the compact task performance issue, be aware that this parameter causes all databases above the limit to bypass the cache for all database operations. Depending on the server configuration and databases used, this may cause an impact on database read performance.
Once enabled, these parameters can have a marked impact on compact performance. The following chart illustrates tests performed on sample databases with compact. Note that these times are for comparison purposes only. The contents of the database and the hardware capabilities of the Domino system performing the compact can cause variations in performance.