Performance 欺骗+；Memcached编解码器性能差

我在欺骗应用程序中使用memcached编解码器。但是性能非常差，比使用SpymeCached客户端差得多。我用spymemached得到了8k请求/秒，用finagle的memcached编解码器得到了10个请求/秒。memcached也在我的机器上运行。我错过什么了吗？ 压力测试期间的错误示例：

Mar 05, 2014 10:22:10 AM com.twitter.finagle.builder.SourceTrackingMonitor handle
SEVERE: A server service httpserver threw an exception
com.twitter.finagle.ChannelWriteException: org.jboss.netty.channel.ConnectTimeoutException: connection timed out: localhost/127.0.0.1:11211
at com.twitter.finagle.NoStacktrace(Unknown Source)
Caused by: org.jboss.netty.channel.ConnectTimeoutException: connection timed out: localhost/127.0.0.1:11211
at org.jboss.netty.channel.socket.nio.NioClientBoss.processConnectTimeout(NioClientBoss.java:137)
at org.jboss.netty.channel.socket.nio.NioClientBoss.process(NioClientBoss.java:83)
at org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:318)
at org.jboss.netty.channel.socket.nio.NioClientBoss.run(NioClientBoss.java:42)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)

客户端的配置方式：

 def client = Client( ClientBuilder()
    .hosts(parseHosts())
    .hostConnectionLimit(10)
    .codec(Memcached())
    .retries(2)
    .daemon(true)
    .build() )

一个简单的get操作：

def getUserTries(username: String): Future[Int] = {
   client.get(s"${username}_tries") flatMap { v => v match {
      case Some(c:ChannelBuffer) => Future.value( UserCache.fromChannelBuffer(c).toInt )
      case _ => Future.value(0)
   }
}

def saveUserTries(username: String, tries: Int): Future[Unit] = {
   client.set( s"${username}_tries", UserCache.toChannelBuffer(tries.toString) )
}

和一个集合操作：

def getUserTries(username: String): Future[Int] = {
   client.get(s"${username}_tries") flatMap { v => v match {
      case Some(c:ChannelBuffer) => Future.value( UserCache.fromChannelBuffer(c).toInt )
      case _ => Future.value(0)
   }
}

def saveUserTries(username: String, tries: Int): Future[Unit] = {
   client.set( s"${username}_tries", UserCache.toChannelBuffer(tries.toString) )
}

---

您应该通过Finagle获得类似的性能，但我看不出您粘贴的代码有任何错误。 你也许应该看看这个，并根据你的使用情况调整它