Indices stats store values seem not coherent

Elastic Stack Elasticsearch
1

Hello, i've been using the /_stats endpoint to recover the size of my indices, however it seems that the values are not the same between GET /_stats/store?expand_wildcards=all and GET /_stats?expand_wildcards=all, i'm only interested in the total store value. The results look like this:

GET /_stats/store?expand_wildcards=all

".ds-test-1" : {
      "primaries" : {
        "store" : {
          "size_in_bytes" : 303107785212,
          "total_data_set_size_in_bytes" : 303107785212,
          "reserved_in_bytes" : 0
        }
      },
      "total" : {
        "store" : {
          "size_in_bytes" : 509955534347,
          "total_data_set_size_in_bytes" : 509955534347,
          "reserved_in_bytes" : 168212146305
        }
      }
    },

GET /_stats?expand_wildcards=all
".ds-test-1" : {
      "primaries" : {
        "store" : {
          "size_in_bytes" : 303113948595,
          "total_data_set_size_in_bytes" : 303113948595,
          "reserved_in_bytes" : 0
        }
      },
      "total" : {
        "store" : {
          "size_in_bytes" : 303113948595,
          "total_data_set_size_in_bytes" : 303113948595,
          "reserved_in_bytes" : 0
        },
      }
    }

Is there a reason for this values to be different? and what is the actual meaning of reserved in bytes and its relation to the rest of the values?

2

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