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Behavior of ThreadedCachingBlockSource

in Oracle JDBC (MOSC) 3 commentsAnswered

Oracle Product: Oracle JDBC Driver 21.1.0.0

Question:

About the byte[][] array in "stack" field of oracle.jdbc.dirver.BlockSource$ThreadedCachingBlockSource objects hold by each oracle.jdbc.driver.PhysicalConnection object:

 - What is the condition that the size of byte[][] array is expanded?

 - What is the condition that the element of each byte[] array is removed (null cleared)?

 - How to avoid these expantion/compaction behavior?

I'm confused that these expantion/compaction behavior makes many large byte[] array object to be monotonically increased. (it will fill the Tenured area, and will be collected by FullGC only)

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