High-performance Java Persistence.pdf Jun 2026

This executes a single SQL update statement, bypassing the Persistence Context entirely and saving massive overhead.

Second-level cache and query cache

A bank’s quarterly report generation took 6 hours. The code looped over millions of records, causing massive JVM heap pressure and GC pauses. By switching to and JDBC batching (Chapter 12 of the PDF), the runtime dropped to 25 minutes. High-performance Java Persistence.pdf