Elastic thinks that it uses all RAM

Hello, I noticed one thing about our cluster. When I made curl request (curl -XGET 'http://h1-es01:9200/_nodes/stats/os?pretty') I saw this:
h1-es01

        "mem" : {
          "total_in_bytes" : 134885113856,
          "free_in_bytes" : 7174373376,
          "used_in_bytes" : 127710740480,
          "free_percent" : 5,
          "used_percent" : 95
        },

h1-es02

        "mem" : {
          "total_in_bytes" : 134885163008,
          "free_in_bytes" : 485310464,
          "used_in_bytes" : 134399852544,
          "free_percent" : 0,
          "used_percent" : 100
        },

h1-es03

        "mem" : {
          "total_in_bytes" : 134885113856,
          "free_in_bytes" : 8599916544,
          "used_in_bytes" : 126285197312,
          "free_percent" : 6,
          "used_percent" : 94
        },

same in elasticvue:

But if I use htop it shows only 42 gb used. How it may be and which bad things can happen as a result of this?

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