Java tips

java_tips.txt

1. String Deduplication of G1 Garbage collector to Save Memory from Duplicate String in Java 8
  String deduplication is not enabled by default in Java 8 JVM. You can enable String deduplication feature 
  by using -XX:+UseStringDeduplication option. Unfortunately, String deduplication is only available for the 
  G1 garbage collector, so if you are not using G1 GC then you cannot use the String deduplication feature. 
  It means just providing -XX:+UseStringDeduplication will not work, you also need to turn on G1 garbage collector 
  using -XX:+UseG1GC option. String deduplication also doesn't consider relatively young String for processing. 
  The minimal age of processed String is controlled by -XX:StringDeduplicationAgeThreshold=3 option. 
  The default value of this parameter is 3.