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高速缓存命中率

Microsoft.SQLServer.2008.DBEngine.BufferCacheHitRatioMonitor (UnitMonitor)

针对 2008 数据库引擎的缓冲区缓存命中率

Knowledge Base article:

摘要

针对 SQL 2008 数据库引擎的缓冲区缓存命中率监视器

可在缓冲池中找到而不必从磁盘读取的页所占的百分比。

原因

零值指示内存瓶颈 - SQL Server 无法有效地在内存中缓存数据页；从磁盘读取的量相对较高。

解决方法

Element properties:

TargetMicrosoft.SQLServer.2008.DBEngine
Parent MonitorSystem.Health.PerformanceState
CategoryPerformanceHealth
EnabledTrue
Alert GenerateTrue
Alert SeverityError
Alert PriorityNormal
Alert Auto ResolveTrue
Monitor TypeMicrosoft.SQLServer.2008.DBEngine.BufferCacheHitRatio.MonitorType
RemotableTrue
AccessibilityPublic
Alert Message
缓冲区缓存命中率过低
计算机“{1}”上 SQL 实例“{0}”的缓冲区缓存命中率过低。有关详细信息，请参阅“警报上下文”选项卡。
RunAsDefault

Source Code:

<UnitMonitor ID="Microsoft.SQLServer.2008.DBEngine.BufferCacheHitRatioMonitor" Accessibility="Public" Enabled="true" Target="SQL2008Core!Microsoft.SQLServer.2008.DBEngine" ParentMonitorID="SystemHealth!System.Health.PerformanceState" Remotable="true" Priority="Normal" TypeID="Microsoft.SQLServer.2008.DBEngine.BufferCacheHitRatio.MonitorType" ConfirmDelivery="false">

  <Category>PerformanceHealth</Category>

  <AlertSettings AlertMessage="Microsoft.SQLServer.2008.DBEngine.BufferCacheHitRatioMonitor.AlertMessage">

    <AlertOnState>Error</AlertOnState>

    <AutoResolve>true</AutoResolve>

    <AlertPriority>Normal</AlertPriority>

    <AlertSeverity>Error</AlertSeverity>

    <AlertParameters>

      <AlertParameter1>$Target/Property[Type="SQL!Microsoft.SQLServer.ServerRole"]/InstanceName$</AlertParameter1>

      <AlertParameter2>$Target/Host/Property[Type="Windows!Microsoft.Windows.Computer"]/NetworkName$</AlertParameter2>

    </AlertParameters>

  </AlertSettings>

  <OperationalStates>

    <OperationalState ID="Normal" MonitorTypeStateID="Normal" HealthState="Success"/>

    <OperationalState ID="Error" MonitorTypeStateID="Error" HealthState="Error"/>

  </OperationalStates>

  <Configuration>

    <IntervalSeconds>300</IntervalSeconds>

    <Threshold>0</Threshold>

    <NumSamples>6</NumSamples>

  </Configuration>

</UnitMonitor>