Understanding ReservedCodeCacheSize in JVM

The parameter -XX:ReservedCodeCacheSize is used to set the size of the code cache that the JVM reserves. The code cache is used to store locally compiled code by the JIT compiler to improve runtime performance. By adjusting this parameter, you can control the size of the code cache, which in turn affects the performance of JIT compilation and runtime. The default value depends on the JVM version and the running environment, typically set at 240MB. Increasing this parameter value can enhance JIT compilation performance but will consume more memory space.