Monitors the disk Read latency from all logical disks which host database files.
Monitors the disk Read latency from all logical disks which host database files.
The problem may be caused by a disk bottleneck or disk contention.
This issue may be resolved by either:
Determine if disk performance has degraded or workload has increased.
Evaluate SQL Server Storage Best practices.
Enabling autogrowth for at least one file
Determine if storage for database files has been overcommitted e.g. shared storage in SAN or Virtual Machines.
Name | Description | Default Value |
Alert Priority | Defines Alert Priority. | High |
Alert Severity | Defines Alert Severity. | MatchMonitorHealth |
Critical Threshold | The monitor will change its state to Critical if the value exceeds this threshold. | 40 |
Enabled | Enables or disables the workflow. | No |
Generates Alerts | Defines whether the workflow generates an Alert. | Yes |
Interval (seconds) | The recurring interval of time in seconds in which to run the workflow. | 900 |
Number of samples | Indicates how many times a measured value should breach a threshold before the state is changed. | 6 |
Synchronization Time | The synchronization time specified by using a 24-hour format. May be omitted. |
|
Timeout (seconds) | Specifies the time the workflow is allowed to run before being closed and marked as failed. | 300 |
Target | Microsoft.SQLServer.Windows.Database | ||
Parent Monitor | System.Health.PerformanceState | ||
Category | PerformanceHealth | ||
Enabled | False | ||
Alert Generate | True | ||
Alert Severity | MatchMonitorHealth | ||
Alert Priority | High | ||
Alert Auto Resolve | True | ||
Monitor Type | Microsoft.SQLServer.Windows.MonitorType.Database.DBDiskReadLatency | ||
Remotable | True | ||
Accessibility | Public | ||
Alert Message |
| ||
RunAs | Default |
<UnitMonitor ID="Microsoft.SQLServer.Windows.Monitor.Database.DBDiskReadLatency" Accessibility="Public" Enabled="false" Target="SqlDiscW!Microsoft.SQLServer.Windows.Database" ParentMonitorID="Health!System.Health.PerformanceState" Remotable="true" Priority="Normal" TypeID="Microsoft.SQLServer.Windows.MonitorType.Database.DBDiskReadLatency" ConfirmDelivery="false">
<Category>PerformanceHealth</Category>
<AlertSettings AlertMessage="Microsoft.SQLServer.Windows.Monitor.Database.DBDiskReadLatency.AlertMessage">
<AlertOnState>Error</AlertOnState>
<AutoResolve>true</AutoResolve>
<AlertPriority>High</AlertPriority>
<AlertSeverity>MatchMonitorHealth</AlertSeverity>
<AlertParameters>
<AlertParameter1>$Target/Property[Type="SqlCoreLib!Microsoft.SQLServer.Core.Database"]/DatabaseName$</AlertParameter1>
<AlertParameter2>$Target/Host/Property[Type="SqlCoreLib!Microsoft.SQLServer.Core.DBEngine"]/InstanceName$</AlertParameter2>
<AlertParameter3>$Target/Host/Property[Type="SqlCoreLib!Microsoft.SQLServer.Core.DBEngine"]/MachineName$</AlertParameter3>
</AlertParameters>
</AlertSettings>
<OperationalStates>
<OperationalState ID="OverThreshold" MonitorTypeStateID="OverThreshold" HealthState="Error"/>
<OperationalState ID="UnderThreshold" MonitorTypeStateID="UnderThreshold" HealthState="Success"/>
</OperationalStates>
<Configuration>
<MachineName>$Target/Host/Property[Type="SqlCoreLib!Microsoft.SQLServer.Core.DBEngine"]/MachineName$</MachineName>
<InstanceName>$Target/Host/Property[Type="SqlCoreLib!Microsoft.SQLServer.Core.DBEngine"]/InstanceName$</InstanceName>
<DatabaseName>$Target/Property[Type="SqlCoreLib!Microsoft.SQLServer.Core.Database"]/DatabaseName$</DatabaseName>
<ObjectName>$Target/Host/Property[Type="SqlCoreLib!Microsoft.SQLServer.Core.DBEngine"]/PerformanceCounterObject$:TransactionLog</ObjectName>
<CounterName>DB Disk Read Latency (ms)</CounterName>
<PerfInstanceName/>
<ValuePropertyName>ReadLatency</ValuePropertyName>
<Threshold>40</Threshold>
<NumSamples>6</NumSamples>
<ConnectionString>$Target/Host/Property[Type="SqlCoreLib!Microsoft.SQLServer.Core.DBEngine"]/ConnectionString$</ConnectionString>
<MonitoringType>$Target/Host/Property[Type="SqlDiscW!Microsoft.SQLServer.Windows.DBEngine"]/MonitoringType$</MonitoringType>
<SqlTimeoutSeconds>15</SqlTimeoutSeconds>
<TimeoutSeconds>300</TimeoutSeconds>
<IntervalSeconds>900</IntervalSeconds>
<SyncTime/>
</Configuration>
</UnitMonitor>