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README.JVM-heap-size

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+
+# ==========================
+# set JVM heap size manually
+# ==========================
+
+# ---
+# Set VVM heap size in file /etc/elasticsearch/jvm.options
+# ---
+
+...
+################################################################
+## IMPORTANT: JVM heap size
+################################################################
+##
+## The heap size is automatically configured by Elasticsearch
+## based on the available memory in your system and the roles
+## each node is configured to fulfill. If specifying heap is
+## required, it should be done through a file in jvm.options.d,
+## and the min and max should be set to the same value. For
+## example, to set the heap to 4 GB, create a new file in the
+## jvm.options.d directory containing these lines:
+##
+## -Xms4g
+## -Xmx4g
+##
+## See https://www.elastic.co/guide/en/elasticsearch/reference/7.17/heap-size.html
+## for more information
+##
+################################################################
+-Xms24g
+-Xmx24g