dongjoon-hyun edited a comment on issue #25836: [SPARK-29159][BUILD] Increase ReservedCodeCacheSize to 1G URL: https://github.com/apache/spark/pull/25836#issuecomment-532970077 @srowen . I took a look. `UseCodeCacheFlushing` was introduced at JDK6 by default `false`, but was changed at JDK7 by default `true`. We are already `true`. I checked with the following. ``` $ java -XX:+PrintFlagsFinal -version | grep UseCodeCacheFlushing bool UseCodeCacheFlushing = true {product} openjdk version "1.8.0_222" OpenJDK Runtime Environment (AdoptOpenJDK)(build 1.8.0_222-b10) OpenJDK 64-Bit Server VM (AdoptOpenJDK)(build 25.222-b10, mixed mode) ``` Oracle Website is also inconsistent. - https://docs.oracle.com/javase/8/embedded/develop-apps-platforms/codecache.htm 1. In the table, the default value is `false`. 2. In the sentence, the default value is `true`. > The UseCodeCacheFlushing option turns codecache flushing on and off. By default it is on. You can disable this feature by specifying XX:-UseCodeCacheFlushing.
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