FreeBSD/jails/config/elk/jvm.options

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## JVM configuration
################################################################
## IMPORTANT: JVM heap size
################################################################
##
## You should always set the min and max JVM heap
## size to the same value. For example, to set
## the heap to 4 GB, set:
##
## -Xms4g
## -Xmx4g
##
## See https://www.elastic.co/guide/en/elasticsearch/reference/current/heap-size.html
## for more information
##
################################################################
# Xms represents the initial size of total heap space
# Xmx represents the maximum size of total heap space
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-Xmn4G
-Xms8G
-Xmx8G
-XX:MaxMetaspaceSize=2G
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-Xss1G
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-Xnoclassgc
-XX:MaxDirectMemorySize=2G
-XX:InitialRAMPercentage=80
-XX:MaxRAMPercentage=80
-XX:MinRAMPercentage=80
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################################################################
## Expert settings
################################################################
##
## All settings below this section are considered
## expert settings. Don't tamper with them unless
## you understand what you are doing
##
################################################################
## GC configuration
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8-9:-XX:+UseConcMarkSweepGC
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8-13:-XX:CMSInitiatingOccupancyFraction=75
8-13:-XX:+UseCMSInitiatingOccupancyOnly
## G1GC Configuration
# NOTE: G1 GC is only supported on JDK version 10 or later
# to use G1GC, uncomment the next two lines and update the version on the
# following three lines to your version of the JDK
# 10-13:-XX:-UseConcMarkSweepGC
# 10-13:-XX:-UseCMSInitiatingOccupancyOnly
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11-:-XX:+UseG1GC
11-:-XX:G1ReservePercent=25
11-:-XX:InitiatingHeapOccupancyPercent=30
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## JVM temporary directory
-Djava.io.tmpdir=${ES_TMPDIR}
## heap dumps
# generate a heap dump when an allocation from the Java heap fails
# heap dumps are created in the working directory of the JVM
-XX:+HeapDumpOnOutOfMemoryError
# specify an alternative path for heap dumps; ensure the directory exists and
# has sufficient space
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-XX:HeapDumpPath=/data
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# specify an alternative path for JVM fatal error logs
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-XX:ErrorFile=/var/log/hs_err_pid%p.log
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## JDK 8 GC logging
8:-XX:+PrintGCDetails
8:-XX:+PrintGCDateStamps
8:-XX:+PrintTenuringDistribution
8:-XX:+PrintGCApplicationStoppedTime
8:-Xloggc:${ES_TMPDIR}/gc.log
8:-XX:+UseGCLogFileRotation
8:-XX:NumberOfGCLogFiles=32
8:-XX:GCLogFileSize=64m
# JDK 9+ GC logging
9-:-Xlog:gc*,gc+age=trace,safepoint:file=${ES_TMPDIR}/gc.log:utctime,pid,tags:filecount=32,filesize=64m