Logstash Kafka输入插件的低性能，除了度量之外没有op输出

测试环境如下：

CPU: Intel L5640 2.26 GHz 6 cores * 2 EA
Memory: SAMSUNG PC3-10600R 4 GB * 4 EA
HDD: TOSHIBA SAS 10,000 RPM 300 GB * 6 EA

OS: CentOS release 6.6 (Final)

Logstash 2.3.4

我使用了以下配置：

input {
  kafka {
    zk_connect => '1.2.3.4:2181'
    topic_id => 'some-log'
    consumer_threads => 1
  }
}

filter {
  metrics {
    meter => "events"
    add_tag => "metric"
  }
}

output {
  if "metric" in [tags] {
    stdout {
      codec => line {
        format => "Count: %{[events][count]}"
      }
    }
  }
}

我得到了以下结果：

./bin/logstash -f some-log-kafka.conf                                
Settings: Default pipeline workers: 24
Pipeline main started
Count: 9614
Count: 23080
Count: 37087
Count: 50815
Count: 64517
Count: 78296
Count: 91977
Count: 105990

./bin/logstash -f impression-log-kafka.conf 
Settings: Default pipeline workers: 24
Pipeline main started
Count: 9599
Count: 23254
Count: 37253
Count: 51029
Count: 64881
Count: 78868
Count: 92663
Count: 106267

默认的刷新间隔是5秒，所以看起来大约是每5秒14K（每秒2.8K）

当

consumer\u threads

设置为10时，我得到了以下结果：

./bin/logstash -f some-log-kafka.conf                                
Settings: Default pipeline workers: 24
Pipeline main started
Count: 9614
Count: 23080
Count: 37087
Count: 50815
Count: 64517
Count: 78296
Count: 91977
Count: 105990

./bin/logstash -f impression-log-kafka.conf 
Settings: Default pipeline workers: 24
Pipeline main started
Count: 9599
Count: 23254
Count: 37253
Count: 51029
Count: 64881
Count: 78868
Count: 92663
Count: 106267

它看起来越来越多的

消费者线程

没有多大区别

根据我简单的无操作消费者基准测试，我预计大约为3万，至少为10万，但这只是预期性能的1/10

如何提高其性能

补充意见： 对于Kafka客户端Java库，我使用引导服务器，而对于Logstash Kafka输入插件，我使用ZooKeeper（引导服务器没有选项）。我不确定这是否会导致巨大的差异