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Buffer Cache Hit Ratio

Microsoft.SQLServer.2012.DBEngine.BufferCacheHitRatioMonitor (UnitMonitor)

2012 資料庫引擎的緩衝區快取點擊率

Knowledge Base article:

摘要

SQL 2012 資料庫引擎的緩衝區快取點擊率監視器

在緩衝集區中找到不需從磁碟讀取的頁面百分比。

原因

零值表示記憶體瓶頸 - SQL Server 無法有效率地快取記憶體中的資料頁面，而且磁碟的讀取次數相當高。

解決方式

Element properties:

TargetMicrosoft.SQLServer.2012.DBEngine
Parent MonitorSystem.Health.PerformanceState
CategoryPerformanceHealth
EnabledTrue
Alert GenerateTrue
Alert SeverityError
Alert PriorityNormal
Alert Auto ResolveTrue
Monitor TypeMicrosoft.SQLServer.2012.DBEngine.BufferCacheHitRatio.MonitorType
RemotableTrue
AccessibilityPublic
Alert Message
SQL 資料庫引擎 2012 緩衝區快取點擊率太低
電腦 "{1}" 上 SQL 執行個體 "{0}" 的緩衝區快取點擊率太低。請參閱 [警示內容] 索引標籤，以取得詳細資料。
RunAsDefault

Source Code:

<UnitMonitor ID="Microsoft.SQLServer.2012.DBEngine.BufferCacheHitRatioMonitor" Accessibility="Public" Enabled="true" Target="SQL2012Core!Microsoft.SQLServer.2012.DBEngine" ParentMonitorID="SystemHealth!System.Health.PerformanceState" Remotable="true" Priority="Normal" TypeID="Microsoft.SQLServer.2012.DBEngine.BufferCacheHitRatio.MonitorType" ConfirmDelivery="false">

  <Category>PerformanceHealth</Category>

  <AlertSettings AlertMessage="Microsoft.SQLServer.2012.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>