ElasticSearch is swapping - elasticsearch

Question

I have launch my new site today and have problems with the SWAP of ElasticSearch. I don't know how to fix it because I have give enought heap memory for each of the 2 nodes, but somehow, there are problems.
I am attaching the previews from HQ. Can someone help me?
---- config /etc/elasticsearch.yml ---
cluster.name: xxx
node.name: xxx
node.data: true
node.master: true
bootstrap.mlockall: true
index.translog.flush_threshold_ops: 50000
index.merge.policy.merge_factor: 5
index.merge.policy.segments_per_tier: 10
# Bulk pool
threadpool.bulk.type: fixed
threadpool.bulk.size: 1000
threadpool.bulk.queue_size: 30000
# Index pool
threadpool.index.type: fixed
threadpool.index.size: 1000
threadpool.index.queue_size: 10000
index.cache.query.enable: true
indices.cache.query.size: 15%
index.cache.field.expire: 1h
indices.fielddata.cache.size: 15%
indices.fielddata.cache.expire : 1h
indices.cache.filter.size: 15%
index.store.type: mmapfs
transport.tcp.compress: true;
network.bind_host: xxxx
network.publish_host: xxxx
network.host: xxxx
discovery.zen.ping.unicast.hosts: ["xxxx"]
discovery.zen.ping.multicast.enabled: false
discovery.zen.ping.timeout: 10s
transport.tcp.port: 9300
http.port: 9200
http.max_content_length: 500mb
index.routing.allocation.disable_allocation: false
index.search.slowlog.threshold.query.warn: 10s
index.search.slowlog.threshold.query.info: 5s
index.search.slowlog.threshold.query.debug: 2s
index.search.slowlog.threshold.query.trace: 500ms
script.engine.groovy.inline.aggs: on
script.inline: on
script.indexed: on
index.max_result_window: 40000
--- config /etc/default/elasticsearch -----
ES_HEAP_SIZE=5g
---- JAVA process -----
/usr/bin/java -Xms5g -Xmx5g -Djava.awt.headless=true -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:CMSInitiatingOccupancyFraction=75 -XX:+UseCMSInitiatingOccupancyOnly -XX:+HeapDumpOnOutOfMemoryError -XX:+DisableExplicitGC -Dfile.encoding=UTF-8 -Djna.nosys=true -Des.path.home=/usr/share/elasticsearch -cp /usr/share/elasticsearch/lib/elasticsearch-2.3.1.jar:/usr/share/elasticsearch/lib/* org.elasticsearch.bootstrap.Elasticsearch start -Des.pidfile=/var/run/elasticsearch/elasticsearch.pid -Des.default.path.home=/usr/share/elasticsearch -Des.default.path.logs=/var/log/elasticsearch -Des.default.path.data=/var/lib/elasticsearch -Des.default.path.conf=/etc/elasticsearch
---- node info ----
{"cluster_name":"xxxxx_search","nodes":{"Tze_hXZ2SwqQIvg4YWOcMg":{"timestamp":1460563870399,"name":"xxxxx-slave-1","transport_address":"xxxx:9301","host":"xxxxx","ip":["xxxxx:9301","NONE"],"jvm":{"timestamp":1460563870399,"uptime_in_millis":17908517,"mem":{"heap_used_in_bytes":2679603328,"heap_used_percent":50,"heap_committed_in_bytes":5333843968,"heap_max_in_bytes":5333843968,"non_heap_used_in_bytes":105721416,"non_heap_committed_in_bytes":108711936,"pools":{"young":{"used_in_bytes":15540664,"max_in_bytes":279183360,"peak_used_in_bytes":279183360,"peak_max_in_bytes":279183360},"survivor":{"used_in_bytes":2730400,"max_in_bytes":34865152,"peak_used_in_bytes":34865152,"peak_max_in_bytes":34865152},"old":{"used_in_bytes":2661332264,"max_in_bytes":5019795456,"peak_used_in_bytes":3813217632,"peak_max_in_bytes":5019795456}}},"threads":{"count":56,"peak_count":63},"gc":{"collectors":{"young":{"collection_count":1170,"collection_time_in_millis":38743},"old":{"collection_count":4,"collection_time_in_millis":220}}},"buffer_pools":{"direct":{"count":61,"used_in_bytes":15744627,"total_capacity_in_bytes":15744627},"mapped":{"count":85,"used_in_bytes":4319218096,"total_capacity_in_bytes":4319218096}}}},"DrG535FuQKygzKlSCAWwLw":{"timestamp":1460563870399,"name":"xxxxx-master-1","transport_address":"xxxxx:9300","host":"xxxx","ip":["xxxxx:9300","NONE"],"attributes":{"master":"true"},"jvm":{"timestamp":1460563870399,"uptime_in_millis":17912689,"mem":{"heap_used_in_bytes":2315059272,"heap_used_percent":43,"heap_committed_in_bytes":5333843968,"heap_max_in_bytes":5333843968,"non_heap_used_in_bytes":118353088,"non_heap_committed_in_bytes":121683968,"pools":{"young":{"used_in_bytes":172840784,"max_in_bytes":279183360,"peak_used_in_bytes":279183360,"peak_max_in_bytes":279183360},"survivor":{"used_in_bytes":2480072,"max_in_bytes":34865152,"peak_used_in_bytes":34865152,"peak_max_in_bytes":34865152},"old":{"used_in_bytes":2139738416,"max_in_bytes":5019795456,"peak_used_in_bytes":3826731840,"peak_max_in_bytes":5019795456}}},"threads":{"count":59,"peak_count":71},"gc":{"collectors":{"young":{"collection_count":1368,"collection_time_in_millis":47571},"old":{"collection_count":5,"collection_time_in_millis":270}}},"buffer_pools":{"direct":{"count":71,"used_in_bytes":24539898,"total_capacity_in_bytes":24539898},"mapped":{"count":84,"used_in_bytes":4318926707,"total_capacity_in_bytes":4318926707}},"classes":{"current_loaded_count":9552,"total_loaded_count":9695,"total_unloaded_count":143}}}}}
---- node process ---
{"cluster_name":"xxxx_search","nodes":{"Tze_hXZ2SwqQIvg4YWOcMg":{"name":"xxxx-slave-1","transport_address":"xxxx:9301","host":"xxxx","ip":"xxxx","version":"2.3.1","build":"bd98092","http_address":"xxxx:9201","process":{"refresh_interval_in_millis":1000,"id":25686,"mlockall":false}},"DrG535FuQKygzKlSCAWwLw":{"name":"xxxx-master-1","transport_address":"xxxx:9300","host":"xxxx","ip":"xxxx","version":"2.3.1","build":"bd98092","http_address":"xxxx:9200","attributes":{"master":"true"},"process":{"refresh_interval_in_millis":1000,"id":25587,"mlockall":false}}}}
Thanks!