add upstream jvm options to ingestor_syslog

Author: bengerman13

jobs/ingestor_syslog/templates/config/jvm.options.erb

@@ -1,4 +1,96 @@
-# the default /tmp dir is often noexec, so we need to use one that is not.
+################################################################
+# logstash base config
+# this is the stuff from Elastic. We should update this whenever we update logstash
+################################################################
+## JVM configuration
+
+# Xms represents the initial size of total heap space
+# Xmx represents the maximum size of total heap space
+
+-Xms1g
+-Xmx1g
+
+################################################################
+## 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
+8-13:-XX:+UseConcMarkSweepGC
+8-13:-XX:CMSInitiatingOccupancyFraction=75
+8-13:-XX:+UseCMSInitiatingOccupancyOnly
+
+## Locale
+# Set the locale language
+#-Duser.language=en
+
+# Set the locale country
+#-Duser.country=US
+
+# Set the locale variant, if any
+#-Duser.variant=
+
+## basic
+
+# set the I/O temp directory
+#-Djava.io.tmpdir=$HOME
+
+# set to headless, just in case
+-Djava.awt.headless=true
+
+# ensure UTF-8 encoding by default (e.g. filenames)
+-Dfile.encoding=UTF-8
+
+# use our provided JNA always versus the system one
+#-Djna.nosys=true
+
+# Turn on JRuby invokedynamic
+-Djruby.compile.invokedynamic=true
+# Force Compilation
+-Djruby.jit.threshold=0
+# Make sure joni regexp interruptability is enabled
+-Djruby.regexp.interruptible=true
+
+## heap dumps
+
+# generate a heap dump when an allocation from the Java heap fails
+# heap dumps are created in the working directory of the JVM
+-XX:+HeapDumpOnOutOfMemoryError
+
+# specify an alternative path for heap dumps
+# ensure the directory exists and has sufficient space
+#-XX:HeapDumpPath=${LOGSTASH_HOME}/heapdump.hprof
+
+## GC logging
+#-XX:+PrintGCDetails
+#-XX:+PrintGCTimeStamps
+#-XX:+PrintGCDateStamps
+#-XX:+PrintClassHistogram
+#-XX:+PrintTenuringDistribution
+#-XX:+PrintGCApplicationStoppedTime
+
+# log GC status to a file with time stamps
+# ensure the directory exists
+#-Xloggc:${LS_GC_LOG_FILE}
+
+# Entropy source for randomness
+-Djava.security.egd=file:/dev/urandom
+
+# Copy the logging context from parent threads to children
+-Dlog4j2.isThreadContextMapInheritable=true
+
+17-:--add-opens java.base/sun.nio.ch=ALL-UNNAMED
+17-:--add-opens java.base/java.io=ALL-UNNAMED
+################################################################
+# end logstash base config. 
+# everything after this is our customizations
+################################################################
+
 -Djava.io.tmpdir=/var/vcap/sys/tmp/ingestor_syslog
 
 <% p('logstash.jvm_options').each do |opt| %><%= opt %><% end %>