Choosing the right mix of I/O sizes for a cache

You can configure up to four pools in any data cache, but, in most cases, caches for individual objects perform best with only a 2K pool and a 16K pool. A cache for a database where the log is not bound to a separate cache should also have a pool configured to match the log I/O size configured for the database; often the best log I/O size is 4K.