The search for "high-performance java persistence pdf 20" refers to High-Performance Java Persistence
Caching (first-level, second-level, query cache) Explain first-level (session) cache is per persistence context and automatic. Second-level cache (e.g., Ehcache, Infinispan) can reduce DB load for frequently-read immutable data; however, caching introduces complexity with invalidation and consistency. Query cache can help repeated query results but must be used cautiously. Cache only when data change frequency and staleness tolerance allow. high-performance java persistence pdf 20
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