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diff --git a/pillar/opensearch/clusters.sls b/pillar/opensearch/clusters.sls
--- a/pillar/opensearch/clusters.sls
+++ b/pillar/opensearch/clusters.sls
@@ -16,3 +16,4 @@
users:
admin: nasqueron.opensearch.infra-logs.internal_users.admin
dashboards: nasqueron.opensearch.infra-logs.internal_users.dashboards
+ heap_size: 26G
diff --git a/roles/opensearch/opensearch/config.sls b/roles/opensearch/opensearch/config.sls
--- a/roles/opensearch/opensearch/config.sls
+++ b/roles/opensearch/opensearch/config.sls
@@ -19,6 +19,15 @@
- context:
config: {{ config }}
+/opt/opensearch/config/jvm.options:
+ file.managed:
+ - source: salt://roles/opensearch/opensearch/files/jvm.options
+ - user: opensearch
+ - group: opensearch
+ - template: jinja
+ - context:
+ heap_size: {{ config['heap_size'] }}
+
# -------------------------------------------------------------
# TLS certificates
#
diff --git a/roles/opensearch/opensearch/files/jvm.options b/roles/opensearch/opensearch/files/jvm.options
new file mode 100644
--- /dev/null
+++ b/roles/opensearch/opensearch/files/jvm.options
@@ -0,0 +1,72 @@
+# -------------------------------------------------------------
+# OpenSearch configuration - JVM
+# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+# Project: Nasqueron
+# License: Trivial work, not eligible to copyright
+# Source file: roles/opensearch/opensearch/files/jvm.options
+# -------------------------------------------------------------
+#
+# <auto-generated>
+# This file is managed by our rOPS SaltStack repository.
+#
+# Changes to this file may cause incorrect behavior
+# and will be lost if the state is redeployed.
+# </auto-generated>
+
+# -------------------------------------------------------------
+# JVM heap size
+#
+# Xms represents the initial size of total heap space
+# Xmx represents the maximum size of total heap space
+# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+
+-Xms{{ heap_size }}
+-Xmx{{ heap_size }}
+
+# -------------------------------------------------------------
+# Expert settings
+# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+
+## GC configuration
+8-13:-XX:+UseConcMarkSweepGC
+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
+14-:-XX:+UseG1GC
+14-:-XX:G1ReservePercent=25
+14-:-XX:InitiatingHeapOccupancyPercent=30
+
+## JVM temporary directory
+-Djava.io.tmpdir=${OPENSEARCH_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
+-XX:HeapDumpPath=data
+
+# specify an alternative path for JVM fatal error logs
+-XX:ErrorFile=logs/hs_err_pid%p.log
+
+## JDK 8 GC logging
+8:-XX:+PrintGCDetails
+8:-XX:+PrintGCDateStamps
+8:-XX:+PrintTenuringDistribution
+8:-XX:+PrintGCApplicationStoppedTime
+8:-Xloggc:logs/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=logs/gc.log:utctime,pid,tags:filecount=32,filesize=64m

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