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diff --git a/app-misc/elasticsearch/files/elasticsearch.conf.4 b/app-misc/elasticsearch/files/elasticsearch.conf.4
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+################################
+# Elasticsearch
+################################
+
+# Elasticsearch home directory
+#ES_HOME=/usr/share/elasticsearch
+
+# Elasticsearch Java path
+#ES_JAVA_HOME=
+
+# Elasticsearch configuration directory
+#CONF_DIR=/etc/elasticsearch
+
+# Elasticsearch data directory
+#DATA_DIR=/var/lib/elasticsearch
+
+# Elasticsearch logs directory
+#LOG_DIR=/var/log/elasticsearch
+
+# Additional Java OPTS
+#ES_JAVA_OPTS=
+
+################################
+# Elasticsearch service
+################################
+
+# When executing the init script, this user will be used to run the elasticsearch service.
+# The default value is 'elasticsearch' and is declared in the init.d file.
+# Note that this setting is only used by the init script. If changed, make sure that
+# the configured user can read and write into the data, work, plugins and log directories.
+# For systemd service, the user is usually configured in file /usr/lib/systemd/system/elasticsearch.service
+#ES_USER=elasticsearch
+#ES_GROUP=elasticsearch
+
+# The number of seconds to wait before checking if Elasticsearch started successfully as a daemon process
+#ES_STARTUP_SLEEP_TIME=5
+
+################################
+# System properties
+################################
+
+# Specifies the maximum file descriptor number that can be opened by this process
+# When using Systemd, this setting is ignored and the LimitNOFILE defined in
+# /usr/lib/systemd/system/elasticsearch.service takes precedence
+MAX_OPEN_FILES=65536
+
+# The maximum number of bytes of memory that may be locked into RAM
+# Set to "unlimited" if you use the 'bootstrap.memory_lock: true' option
+# in elasticsearch.yml.
+# When using Systemd, the LimitMEMLOCK property must be set
+# in /usr/lib/systemd/system/elasticsearch.service
+MAX_LOCKED_MEMORY=unlimited
+
+# Maximum number of VMA (Virtual Memory Areas) a process can own
+# When using Systemd, this setting is ignored and the 'vm.max_map_count'
+# property is set at boot time in /usr/lib/sysctl.d/elasticsearch.conf
+#MAX_MAP_COUNT=262144
+
+# https://www.elastic.co/guide/en/elasticsearch/reference/master/max-number-of-threads.html
+MAX_THREADS=4096
+
+rc_ulimit="-l $MAX_LOCKED_MEMORY -n $MAX_OPEN_FILES -u $MAX_THREADS"