求教熔断器parent的值是怎么算的

Elasticsearch | 作者 wanghx627 | 发布于2020年09月16日 | 阅读数：2749

根据接口_nodes/stats/breaker?pretty，得到

{

  "_nodes" : {

    "total" : 1,

    "successful" : 1,

    "failed" : 0

  },

  "cluster_name" : "es",

  "nodes" : {

    "Ru5FtxEfSHma23mXhzy3ig" : {

      "timestamp" : 1600248223372,

      "roles" : [

        "master",

        "ingest",

        "data",

        "ml"

      ],

      "attributes" : {

        "ml.machine_memory" : "33565143040",

        "ml.max_open_jobs" : "20",

        "xpack.installed" : "true",

        "box_type" : "hot",

      },

      "breakers" : {

        "request" : {

          "limit_size_in_bytes" : 6871947673,

          "limit_size" : "6.3gb",

          "estimated_size_in_bytes" : 0,

          "estimated_size" : "0b",

          "overhead" : 1.0,

          "tripped" : 0

        },

        "fielddata" : {

          "limit_size_in_bytes" : 3435973836,

          "limit_size" : "3.1gb",

          "estimated_size_in_bytes" : 413791928,

          "estimated_size" : "394.6mb",

          "overhead" : 1.03,

          "tripped" : 0

        },

        "in_flight_requests" : {

          "limit_size_in_bytes" : 17179869184,

          "limit_size" : "16gb",

          "estimated_size_in_bytes" : 374,

          "estimated_size" : "374b",

          "overhead" : 2.0,

          "tripped" : 0

        },

        "accounting" : {

          "limit_size_in_bytes" : 17179869184,

          "limit_size" : "16gb",

          "estimated_size_in_bytes" : 3523929685,

          "estimated_size" : "3.2gb",

          "overhead" : 1.0,

          "tripped" : 0

        },

        "parent" : {

          "limit_size_in_bytes" : 15461882265,

          "limit_size" : "14.3gb",

          "estimated_size_in_bytes" : 13101554952,

          "estimated_size" : "12.2gb",

          "overhead" : 1.0,

          "tripped" : 3233

        }

      }

    }

  }

}

parent的estimated_size为啥不等于accounting+in_flight_requests+fielddata+request的estimated_size之和

1 个回复

wanghx627

赞同来自: Charele

如果indices.breaker.total.use_real_memory为true的话，就是堆内存；

    private MemoryUsage memoryUsed(long newBytesReserved) {

        long transientUsage = 0;

        long permanentUsage = 0;



        for (CircuitBreaker breaker : this.breakers.values()) {

            long breakerUsed = (long)(breaker.getUsed() * breaker.getOverhead());

            if (breaker.getDurability() == CircuitBreaker.Durability.TRANSIENT) {

                transientUsage += breakerUsed;

            } else if (breaker.getDurability() == CircuitBreaker.Durability.PERMANENT) {

                permanentUsage += breakerUsed;

            }

        }

        if (this.trackRealMemoryUsage) {

            final long current = currentMemoryUsage();

            return new MemoryUsage(current, current + newBytesReserved, transientUsage, permanentUsage);

        } else {

            long parentEstimated = transientUsage + permanentUsage;

            return new MemoryUsage(parentEstimated, parentEstimated, transientUsage, permanentUsage);

        }

    }

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求教熔断器parent的值是怎么算的

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求教熔断器parent的值是怎么算的

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