AD0-E124: Adobe Experience Manager DevOps Engineer Expert

By Adobe · Question Mode

QuestionQ15

Performance Optimization and Troubleshooting

A DevOps engineer observes that a system periodically becomes slower.

No deployment has occurred recently. Restarting the instance mitigates the performance degradation. If no action is taken, the JVM eventually crashes unpredictably with Out Of Memory exceptions. There is no evident correlation between visitor peaks and instance crashes. The same symptoms occur on both author and publish instances.

What is causing this issue?

Explanation

Unclosed JCR sessions create a resource and memory leak. Each session can retain multiple caches, so the instance progressively slows down and eventually runs out of JVM memory; restarting temporarily removes the accumulated sessions and associated memory use. Adobe documents these as characteristic symptoms of JCR sessions that are never closed.

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