c# - 分析为什么 WCF 比 WSE webservice 慢很多

Question

我们有一个 Web 服务，其中包含 WSE 3.0 端点和 .NET Framework 4.5 上较新的 WCF 端点。

WCF 使用 basicHttpBinding。

问题是新的 WCF 绑定(bind)速度明显变慢 (~3x)。它在幕后使用相同的机制吗？

我阅读了很多有关启用 WCF 跟踪的内容。但是当我在生产中启用它时，我会获得很多信息并且真的不知道如何阅读例如Microsoft Trace Viewer 中的时间线。

如果有任何帮助，我将不胜感激

• 查找性能差异原因的提示
• 从理论角度提出的想法，例如WCF 处理请求的方式是否存在任何内部的主要差异？
• 任何可以帮助分析 WCF 服务器的工具

Notes:

• The issue exists in production; on the test servers everything goes fine. At first we suspected that the load balancer might be a factor, but disabling the load balancer does not change the performance at all

• The slowness could be due our application/domain layer of course. Maybe some thread/connection pool is blocking and messages are getting queued because of that.

  In this case does anyone have an idea why the behaviour is so different from WSE (which runs on the same application pool)? Did any queue sizes/concurrent processing default configurations change dramatically between WSE3.0 and WCF?

  Is there a way to find out when this is happening? E.g. some perfmon counters to watch? In perfmon I just get lost choosing between the huge amount of performance counters available

更新

这是我们服务 Web.config 的匿名版本:

<?xml version="1.0" encoding="utf-8"?>
<configuration>
    <configSections>
        <section name="microsoft.web.services2" type="Microsoft.Web.Services2.Configuration.WebServicesConfiguration, Microsoft.Web.Services2, Version=2.0.3.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
        <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
    </configSections>
    <system.web>
        <httpRuntime executionTimeout="900" maxRequestLength="10240" />
        <webServices>
            <!--<wsdlHelpGenerator href="CustomizedWebServicePage.aspx" />-->
            <protocols>
                <add name="HttpGet" />
                <add name="HttpPost" />
            </protocols>
            <soapExtensionTypes>
                <add type="Microsoft.Web.Services2.WebServicesExtension, Microsoft.Web.Services2, Version=2.0.3.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" priority="1" group="0" />
            </soapExtensionTypes>
        </webServices>
        <compilation defaultLanguage="cs" debug="true" targetFramework="4.5" />
        <customErrors mode="RemoteOnly" />
        <!-- dev only - application pool identity is configured on real environment -->
        <identity impersonate="true" userName="ServiceIdentity" password="********" />
        <authentication mode="Windows" />
        <authorization>
            <allow users="*" />
            <!-- Allow all users -->
        </authorization>
        <trace enabled="false" requestLimit="10" pageOutput="false" traceMode="SortByTime" localOnly="true" />
        <sessionState mode="InProc" cookieless="false" timeout="20" sqlConnectionString="data source=127.0.0.1;user id=someuserid;password=********;port=42424" />
        <globalization requestEncoding="utf-8" responseEncoding="utf-8" />
        <pages controlRenderingCompatibilityVersion="3.5" clientIDMode="AutoID" />
    </system.web>
    <microsoft.web.services2>
        <diagnostics>
            <detailedErrors enabled="true" />
        </diagnostics>
        <policy>
            <cache name="policyCache.xml" />
        </policy>
        <security>
            <timeToleranceInSeconds>43200</timeToleranceInSeconds>
            <defaultTtlInSeconds>43200</defaultTtlInSeconds>
            <x509 storeLocation="LocalMachine" verifyTrust="false" />
            <securityTokenManager type="OurProduct.Business.Authentication.CustomUsernameTokenManager, OurProduct.Business, Version=5.0.2.11517, Culture=neutral" qname="wsse:UsernameToken" xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd" />
        </security>
        <messaging>
            <maxRequestLength>10240</maxRequestLength>
        </messaging>
    </microsoft.web.services2>
    <startup>
        <supportedRuntime version="v2.0.50727" />
    </startup>
    <system.serviceModel>
        <diagnostics wmiProviderEnabled="true">
            <messageLogging logMalformedMessages="true" logMessagesAtTransportLevel="true" />
        </diagnostics>
        <serviceHostingEnvironment aspNetCompatibilityEnabled="true" multipleSiteBindingsEnabled="true" />
        <services>
            <service behaviorConfiguration="OurServiceBehavior" name="OurProduct.Service.OurService">
                <endpoint address=""      binding="basicHttpBinding"  bindingConfiguration="BasicHttpBinding_IXXXOurService" bindingNamespace="http://localhost/XXXOurService" contract="OurProduct.ServiceContracts.XXXOurService.IXXXOurService" />
            </service>
        </services>
        <behaviors>
            <serviceBehaviors>
                <behavior name="OurServiceBehavior">
                    <dataContractSerializer maxItemsInObjectGraph="2147483647" />
                    <serviceMetadata httpGetEnabled="false" httpsGetEnabled="true" />
                    <serviceDebug includeExceptionDetailInFaults="true" />
                    <serviceCredentials>
                        <userNameAuthentication userNamePasswordValidationMode="Custom" customUserNamePasswordValidatorType="OurProduct.Service.Validation.CustomUserNamePasswordValidator, OurProduct.Service" />
                    </serviceCredentials>
                </behavior>
                <behavior name="">
                    <serviceMetadata httpGetEnabled="true" httpsGetEnabled="true" />
                    <serviceDebug includeExceptionDetailInFaults="false" />
                </behavior>
            </serviceBehaviors>
        </behaviors>
        <bindings>
            <basicHttpBinding>
                <binding name="BasicHttpBinding_IXXXOurService" closeTimeout="00:01:00" openTimeout="00:01:00" receiveTimeout="00:15:00" sendTimeout="00:15:00" bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard" maxBufferPoolSize="524288000" maxBufferSize="524288000" transferMode="Buffered" maxReceivedMessageSize="524288000" messageEncoding="Mtom" textEncoding="utf-8" useDefaultWebProxy="true" allowCookies="false">
                    <readerQuotas maxDepth="524288000" maxStringContentLength="524288000" maxArrayLength="524288000" maxBytesPerRead="524288000" maxNameTableCharCount="524288000" />
                    <security mode="TransportWithMessageCredential">
                        <transport clientCredentialType="None"     />
                        <message   clientCredentialType="UserName" />
                    </security>
                </binding>
            </basicHttpBinding>
        </bindings>
    </system.serviceModel>
    <runtime>
        <gcServer     enabled="true" />
        <gcConcurrent enabled="true" />
    </runtime>
    <system.webServer>
        <security>
            <requestFiltering>
                <requestLimits maxAllowedContentLength="10485761" /> <!-- 10 megabytes -->
            </requestFiltering>
        </security>
    </system.webServer>
</configuration>

Answer 1

您的 WCF 服务配置文件似乎没有明确设置限制值。您可能希望使用性能监视器来跟踪 WCF 资源和/或调整默认值以确保您没有达到默认的节流限制。

服务节流 (serviceThrottling) 允许您均衡后端 WCF 服务器上的负载并强制执行资源分配。后端 WCF 服务的 serviceThrottling 行为是通过修改 WCF 服务配置文件中的 maxConcurrentCalls、maxConcurrentSessions 和 maxConcurrentInstances 参数值来配置的.

<serviceThrottling
maxConcurrentCalls="200"
maxConcurrentSessions="200"
maxConcurrentInstances="200" />

https://msdn.microsoft.com/en-us/library/ee377061%28v=bts.70%29.aspx