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4.3. Cache Configuration
By default, result set caching is enabled with 1024 maximum entries with a maximum entry age of two hours. There are actually two caches configured with these settings. One cache holds results that are specific to sessions and is local to each Red Hat JBoss Data Virtualization instance. The other cache holds VDB scoped results and can be replicated.
You can also override the default maximum entry age via the Cache Hint.
Result set caching is not limited to memory. There is no explicit limit on the size of the results that can be cached. Cached results are primarily stored in the BufferManager and are subject to its configuration, including the restriction of maximum buffer space.
Important
While the result data is not held in memory, cache keys - including parameter values - may be held in memory. Thus the cache should not be given an unlimited maximum size.
Result set cache entries can be invalidated by data change events. The max-staleness setting determines how long an entry will remain in the case after one of the tables that contributed to the results has been changed.
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