To reduce spinlock contention on the default data cache, Adaptive Server version 12.5.2 automatically changes the way it determines the number of cache partitions for the default data cache.
If both the global cache partition and local cache partition are set to “default,” Adaptive Server version 12.5.2 automatically tunes the number of cache partitions for the default data cache based on the number of engines and the memory available for the default data cache. However, if either of these parameters set to a specific number, Adaptive Server uses that value as the number of local cache partitions for the default data cache and no automatic tuning is performed.
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