$ curl -X GET "localhost:9200/_stats/request_cache?human&pretty"
{
  "_shards" : {
    "total" : 150,
    "successful" : 150,
    "failed" : 0
  },
  "_all" : {
    "primaries" : {
      "request_cache" : {
        "memory_size" : "5.3gb",
        "memory_size_in_bytes" : 5704127595,
        "evictions" : 92998,
        "hit_count" : 503,
        "miss_count" : 209541
      }
    },
    "total" : {
      "request_cache" : {
        "memory_size" : "15.9gb",
        "memory_size_in_bytes" : 17122823024,
        "evictions" : 279275,
        "hit_count" : 1583,
        "miss_count" : 628241
      }
    }
  },
  "indices" : {
    "10wp-1_v2" : {
      "primaries" : {
        "request_cache" : {
          "memory_size" : "2.8gb",
          "memory_size_in_bytes" : 3059655499,
          "evictions" : 59827,
          "hit_count" : 107,
          "miss_count" : 133441
        }
      },
      "total" : {
        "request_cache" : {
          "memory_size" : "8.5gb",
          "memory_size_in_bytes" : 9190131133,
          "evictions" : 179602,
          "hit_count" : 365,
          "miss_count" : 400325
        }
      }
    },
    "9wp-1_v2" : {
      "primaries" : {
        "request_cache" : {
          "memory_size" : "59.7mb",
          "memory_size_in_bytes" : 62601524,
          "evictions" : 432,
          "hit_count" : 262,
          "miss_count" : 6910
        }
      },
      "total" : {
        "request_cache" : {
          "memory_size" : "176.3mb",
          "memory_size_in_bytes" : 184882160,
          "evictions" : 1233,
          "hit_count" : 829,
          "miss_count" : 20640
        }
      }
    },
    "8wp-1_v2" : {
      "primaries" : {
        "request_cache" : {
          "memory_size" : "414.3mb",
          "memory_size_in_bytes" : 434453931,
          "evictions" : 7662,
          "hit_count" : 71,
          "miss_count" : 15570
        }
      },
      "total" : {
        "request_cache" : {
          "memory_size" : "1.2gb",
          "memory_size_in_bytes" : 1316020031,
          "evictions" : 23021,
          "hit_count" : 220,
          "miss_count" : 46680
        }
      }
    },
    "7wp-1_v2" : {
      "primaries" : {
        "request_cache" : {
          "memory_size" : "26.9mb",
          "memory_size_in_bytes" : 28218159,
          "evictions" : 541,
          "hit_count" : 4,
          "miss_count" : 2211
        }
      },
      "total" : {
        "request_cache" : {
          "memory_size" : "78.1mb",
          "memory_size_in_bytes" : 81932087,
          "evictions" : 1590,
          "hit_count" : 18,
          "miss_count" : 6547
        }
      }
    },
    "6wp-1_v2" : {
      "primaries" : {
        "request_cache" : {
          "memory_size" : "13.4mb",
          "memory_size_in_bytes" : 14143529,
          "evictions" : 539,
          "hit_count" : 0,
          "miss_count" : 1352
        }
      },
      "total" : {
        "request_cache" : {
          "memory_size" : "39.4mb",
          "memory_size_in_bytes" : 41364688,
          "evictions" : 1614,
          "hit_count" : 0,
          "miss_count" : 4005
        }
      }
    },
    "5wp-1_v2" : {
      "primaries" : {
        "request_cache" : {
          "memory_size" : "1.9gb",
          "memory_size_in_bytes" : 2045266333,
          "evictions" : 20160,
          "hit_count" : 23,
          "miss_count" : 43174
        }
      },
      "total" : {
        "request_cache" : {
          "memory_size" : "5.7gb",
          "memory_size_in_bytes" : 6130288290,
          "evictions" : 60687,
          "hit_count" : 61,
          "miss_count" : 129394
        }
      }
    },
    "4wp-1_v2" : {
      "primaries" : {
        "request_cache" : {
          "memory_size" : "24.7mb",
          "memory_size_in_bytes" : 25971126,
          "evictions" : 1907,
          "hit_count" : 29,
          "miss_count" : 3096
        }
      },
      "total" : {
        "request_cache" : {
          "memory_size" : "72.9mb",
          "memory_size_in_bytes" : 76526629,
          "evictions" : 5739,
          "hit_count" : 75,
          "miss_count" : 9280
        }
      }
    },
    "3wp-1_v2" : {
      "primaries" : {
        "request_cache" : {
          "memory_size" : "16mb",
          "memory_size_in_bytes" : 16870221,
          "evictions" : 819,
          "hit_count" : 2,
          "miss_count" : 1539
        }
      },
      "total" : {
        "request_cache" : {
          "memory_size" : "49.8mb",
          "memory_size_in_bytes" : 52284326,
          "evictions" : 2433,
          "hit_count" : 3,
          "miss_count" : 4622
        }
      }
    },
    "2wp-1_v2" : {
      "primaries" : {
        "request_cache" : {
          "memory_size" : "16.1mb",
          "memory_size_in_bytes" : 16947273,
          "evictions" : 1111,
          "hit_count" : 5,
          "miss_count" : 2248
        }
      },
      "total" : {
        "request_cache" : {
          "memory_size" : "47.1mb",
          "memory_size_in_bytes" : 49393680,
          "evictions" : 3356,
          "hit_count" : 12,
          "miss_count" : 6748
        }
      }
    },
    "1wp-1_v2" : {
      "primaries" : {
        "request_cache" : {
          "memory_size" : "0b",
          "memory_size_in_bytes" : 0,
          "evictions" : 0,
          "hit_count" : 0,
          "miss_count" : 0
        }
      },
      "total" : {
        "request_cache" : {
          "memory_size" : "0b",
          "memory_size_in_bytes" : 0,
          "evictions" : 0,
          "hit_count" : 0,
          "miss_count" : 0
        }
      }
    }
  }
}