while moving from ES7.2.0 to ES 7.5.1 have observed that the following JVM options thatwere present in ES 7.2 are not present in 7.5.
pre-touch memory pages used by the JVM during initialization
-XX:+AlwaysPreTouch
basic
explicitly set the stack size
-Xss1m
set to headless, just in case
-Djava.awt.headless=true
ensure UTF-8 encoding by default (e.g. filenames)
-Dfile.encoding=UTF-8
use our provided JNA always versus the system one
-Djna.nosys=true
turn off a JDK optimization that throws away stack traces for common
exceptions because stack traces are important for debugging
-XX:-OmitStackTraceInFastThrow
flags to configure Netty
-Dio.netty.noUnsafe=true
-Dio.netty.noKeySetOptimization=true
-Dio.netty.recycler.maxCapacityPerThread=0
log4j 2
-Dlog4j.shutdownHookEnabled=false
-Dlog4j2.disable.jmx=true
WIll the options still be respected if they were to be added to the jvm options file??