2011-10-16 162 views
1

我们有一个跨两台服务器负载均衡的网站,这些服务器调用一个IIS7应用服务器上托管的WCF wsHttp服务。WCF消息安全 - PerCall

上周,该网站推出,我们遇到了性能问题。

该系统由一个离岸团队构建,但我被要求调查是否可以提供帮助。

我加载了perfmon并使用asp.net计数器来查看当前会话。我可以看到,一旦这个数字增加到大约25以上,那么网站就会大大减慢。在接下来的10分钟内,它会继续增加到250,然后降到0,并且网站的性能会很好。

这在一个循环中继续 - 坏消息!

第二天,离岸团队告诉我他们通过调整安全来解决问题。

我有一个理论,在禁用wsHttp绑定WCF的安全性从创建一个实例每个会话更改为每个调用创建一个实例 - 因此允许更大的吞吐量的服务请求。这是一个好理论吗?

我已经构建了一个简单的模型来测试这个,IIS中的几个方法以及一个生成多个请求的简单客户端。这似乎给我预期的结果。问题是,我正在努力寻找正确的性能计数器,以证明当不使用安全绑定时,更少的请求排队并创建更多的并发实例。

任何人都可以请建议最好的perfmon计数器使用?

好的,今天又有一天这个和更多的问题!

在我的测试应用程序,我现在有3个不同的wsHttp绑定

  1. 没有安全
  2. 信息安全
  3. 信息安全但3服务类[ServiceBehavior(InstanceContextMode = InstanceContextMode.PerCall)]在类上设置

从客户端的40循环中,我启动一个新线程并调用该服务。在调用服务1时,服务在1秒内完成所有请求。

当调用服务2时,服务在33秒内完成所有请求。

当调用服务3时,我期望它和服务1几乎一样快,因为我期望服务为4个调用中的每一个实例化一个新的服务对象。但是,它似乎并没有(我仍然没有任何有意义的性能计数器!)来完成这个任务,并且完成时间也是33秒。

这里是从服务的配置:

<?xml version="1.0"?> 
<configuration> 
    <system.diagnostics> 
    <sources> 
     <source name="System.ServiceModel" 
       switchValue="Information, ActivityTracing" 
       propagateActivity="true" > 
     <listeners> 
      <add name="traceListener" 
       type="System.Diagnostics.XmlWriterTraceListener" 
       initializeData="c:\WCFTrace\InstancingDemo.svclog" /> 
     </listeners> 
     </source> 
    </sources> 
    </system.diagnostics> 
    <system.serviceModel> 
    <behaviors> 
     <serviceBehaviors> 
     <behavior name="SecPerCallBehaviour"> 
      <serviceThrottling maxConcurrentSessions="1000" 
           maxConcurrentCalls="30" 
           maxConcurrentInstances="30"/> 
      <serviceMetadata httpGetEnabled="true" /> 
      <serviceDebug includeExceptionDetailInFaults="false" /> 
     </behavior> 
     <behavior name=""> 
      <serviceMetadata httpGetEnabled="true" /> 
      <serviceDebug includeExceptionDetailInFaults="false" /> 
     </behavior> 
     </serviceBehaviors> 
    </behaviors> 
    <serviceHostingEnvironment multipleSiteBindingsEnabled="true" /> 
    <bindings> 
     <wsHttpBinding> 
     <binding name="BindingNoSec"> 
      <security mode="None" /> 
     </binding> 
     <binding name="BindingMessageSec"> 
      <security mode="Message"> 
      <message establishSecurityContext ="true"/> 
      </security> 
     </binding> 
     <binding name="BindingMessageSecPerCall" > 
      <security mode="Message"> 
      <message establishSecurityContext ="true"/> 
      </security> 
     </binding> 
     </wsHttpBinding> 
    </bindings> 
    <services> 
     <service name="ServiceInstancingDemo.Service1"> 
     <endpoint address="~/Service1.svc" 
      binding="wsHttpBinding" bindingConfiguration="BindingNoSec" 
      name="NoSecurity" contract="ServiceInstancingDemo.IService1" /> 
     </service> 
     <service name="ServiceInstancingDemo.Service2"> 
     <endpoint address="~/Service2.svc" 
      binding="wsHttpBinding" bindingConfiguration="BindingMessageSec" 
      contract="ServiceInstancingDemo.IService2" /> 
     </service> 
     <service name="ServiceInstancingDemo.Service3" behaviorConfiguration="SecPerCallBehaviour"> 
     <endpoint address="~/Service3.svc" 
      binding="wsHttpBinding" bindingConfiguration="BindingMessageSecPerCall" 
      contract="ServiceInstancingDemo.IService3" /> 
     </service> 
    </services> 
    </system.serviceModel> 
</configuration> 

下面是来自客户机的配置:

<?xml version="1.0" encoding="utf-8" ?> 
<configuration> 
    <system.serviceModel> 
     <bindings> 
      <wsHttpBinding> 
       <binding name="WSHttpBinding_IService2" closeTimeout="00:01:00" 
        openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00" 
        bypassProxyOnLocal="false" transactionFlow="false" hostNameComparisonMode="StrongWildcard" 
        maxBufferPoolSize="524288" maxReceivedMessageSize="65536" 
        messageEncoding="Text" textEncoding="utf-8" useDefaultWebProxy="true" 
        allowCookies="false"> 
        <readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384" 
         maxBytesPerRead="4096" maxNameTableCharCount="16384" /> 
        <reliableSession ordered="true" inactivityTimeout="00:10:00" 
         enabled="false" /> 
        <security mode="Message"> 
         <transport clientCredentialType="Windows" proxyCredentialType="None" 
          realm="" /> 
         <message clientCredentialType="Windows" negotiateServiceCredential="true" 
          algorithmSuite="Default" establishSecurityContext="true" /> 
        </security> 
       </binding> 
       <binding name="NoSecurity" closeTimeout="00:01:00" openTimeout="00:01:00" 
        receiveTimeout="00:10:00" sendTimeout="00:01:00" bypassProxyOnLocal="false" 
        transactionFlow="false" hostNameComparisonMode="StrongWildcard" 
        maxBufferPoolSize="524288" maxReceivedMessageSize="65536" 
        messageEncoding="Text" textEncoding="utf-8" useDefaultWebProxy="true" 
        allowCookies="false"> 
        <readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384" 
         maxBytesPerRead="4096" maxNameTableCharCount="16384" /> 
        <reliableSession ordered="true" inactivityTimeout="00:10:00" 
         enabled="false" /> 
        <security mode="None"> 
         <transport clientCredentialType="Windows" proxyCredentialType="None" 
          realm="" /> 
         <message clientCredentialType="Windows" negotiateServiceCredential="true" /> 
        </security> 
       </binding> 
       <binding name="WSHttpBinding_IService3" closeTimeout="00:01:00" 
        openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00" 
        bypassProxyOnLocal="false" transactionFlow="false" hostNameComparisonMode="StrongWildcard" 
        maxBufferPoolSize="524288" maxReceivedMessageSize="65536" 
        messageEncoding="Text" textEncoding="utf-8" useDefaultWebProxy="true" 
        allowCookies="false"> 
        <readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384" 
         maxBytesPerRead="4096" maxNameTableCharCount="16384" /> 
        <reliableSession ordered="true" inactivityTimeout="00:10:00" 
         enabled="false" /> 
        <security mode="Message"> 
         <transport clientCredentialType="Windows" proxyCredentialType="None" 
          realm="" /> 
         <message clientCredentialType="Windows" negotiateServiceCredential="true" 
          algorithmSuite="Default" /> 
        </security> 
       </binding> 
      </wsHttpBinding> 
     </bindings> 
     <client> 
      <endpoint address="http://rb-t510/NGCInstancing/Service2.svc/~/Service2.svc" 
       binding="wsHttpBinding" bindingConfiguration="WSHttpBinding_IService2" 
       contract="NGCWithSec.IService2" name="WSHttpBinding_IService2"> 
       <identity> 
        <servicePrincipalName value="host/RB-T510" /> 
       </identity> 
      </endpoint> 
      <endpoint address="http://rb-t510/NGCInstancing/Service1.svc/~/Service1.svc" 
       binding="wsHttpBinding" bindingConfiguration="NoSecurity" 
       contract="NGC.IService1" name="NoSecurity" /> 
      <endpoint address="http://localhost/NGCInstancing/Service3.svc/~/Service3.svc" 
       binding="wsHttpBinding" bindingConfiguration="WSHttpBinding_IService3" 
       contract="NGCSecPerCall.IService3" name="WSHttpBinding_IService3"> 
       <identity> 
        <servicePrincipalName value="host/RB-T510" /> 
       </identity> 
      </endpoint> 
     </client> 
    </system.serviceModel> 
</configuration> 

我想,我错过一个配置设置?或者也许使用wsHttp上的消息安全的多次调用总是会很慢,因为服务器对象必须在每个会话中实例化,并且每个客户端只创建一个会话?

非常感谢

Rob。

回答

1

你想要的柜台必须在服务中直接启用:

<configuration> 
    <system.serviceModel> 
     <diagnostics performanceCounters="All" /> 
    </system.serviceModel> 
</configuration> 

显然,它可以更加精细了。这就是你要读什么书:WCF Performance Counters

更新: 一个更好的链接:How to use performance counters to diagnose performance of WCF applications

+0

嗨,我已经启用了计数器在WCF配置。问题是,perfmon中没有可用的计数器似乎给我所需的信息 - 比如创建的实例的数量。 –

+0

Ernie,这是一个有用的链接 - 谢谢。 –

+0

在perfmon中选择:ServiceModelService 4.0.0.0 - > Instances - >。点击确定。现在在“实例”列表中查找您的服务。 – ErnieL