Considerations for Sizing in ActiveSpaces
TIBCO Support has a collection of resources for accurately estimating the space required for your solution.
TIBCO MDM provides a Cache Calculation spreadsheet to use in your calculations. For more information on documentation, refer to TIBCO MDM System Administration.
As in all memory-based applications (especially long running ones), ActiveSpaces is susceptible to memory fragmentation similar to the main memory fragmentation. Symptoms include increased CPU utilization, slower response times, and higher page reads.
TIBCO recommends scheduling a restart to clean and rebuild the cache. Also, never allocate more than 80% of physical memory to ActiveSpaces. For the cache to utilize the memory efficiently, all instances of cache must use the same CacheConfig.xml.