Verifying Zero-Based Compressed OOPs & reviewing my JVM configs

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Thanks for your response @HenningAndersen. Yes we are using the bundled OpenJDK 12 that comes with ES 7.2.0. I read in another thread that some users are experiencing issues with ES 7.2 while using OpenJDK 12 and G1GC.

It looks like zero-based compressed OOPs are enabled:

$ JAVA_HOME=$ES_HOME/jdk java -Xmx33285996544 -XX:+PrintFlagsFinal 2> /dev/null | grep UseCompressedOops
     bool UseCompressedOops                        := true                                {lp64_product}

I'll enable gc logging and get back to you shortly here.

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