MSSQL on Linux: DB Virtual Log File Count Performance

Microsoft.SQLServer.Linux.MonitorType.Database.VLFCount (UnitMonitorType)

Virtual Log File Count monitor type for MSSQL DBs

Element properties:

RunAsMicrosoft.SQLServer.Core.RunAs.Monitoring
AccessibilityInternal
Support Monitor RecalculateFalse

Member Modules:

ID Module Type TypeId RunAs 
DS DataSource Microsoft.SQLServer.Linux.DataSource.VLFCount Default
ErrorCondition ConditionDetection System.ExpressionFilter Default
NormalCondition ConditionDetection System.ExpressionFilter Default
WarningCondition ConditionDetection System.ExpressionFilter Default

Overrideable Parameters:

IDParameterTypeSelectorDisplay NameDescription
IntervalSecondsint$Config/IntervalSeconds$Interval (seconds)The recurring interval of time in seconds in which to run the workflow.
TimeoutSecondsint$Config/TimeoutSeconds$Timeout (seconds)Specifies the time the workflow is allowed to run before being closed and marked as failed.
WarningThresholdint$Config/WarningThreshold$Warning ThresholdThe collected value will be compared against this parameter.
CriticalThresholdint$Config/CriticalThreshold$Critical ThresholdThe collected value will be compared against this parameter.
SqlExecTimeoutSecondsint$Config/SqlExecTimeoutSeconds$Timeout for query execution (seconds)The workflow will fail and register an event, if the query execution takes longer than the specified period.
SqlTimeoutSecondsint$Config/SqlTimeoutSeconds$Timeout for database connection (seconds)The workflow will fail and register an event, if it cannot access the database during the specified period.

Source Code:

<UnitMonitorType ID="Microsoft.SQLServer.Linux.MonitorType.Database.VLFCount" Accessibility="Internal" RunAs="SqlCoreLib!Microsoft.SQLServer.Core.RunAs.Monitoring">
<MonitorTypeStates>
<MonitorTypeState ID="Normal"/>
<MonitorTypeState ID="Warning"/>
<MonitorTypeState ID="Error"/>
</MonitorTypeStates>
<Configuration>
<xsd:element xmlns:xsd="http://www.w3.org/2001/XMLSchema" name="MachineName" type="xsd:string"/>
<xsd:element xmlns:xsd="http://www.w3.org/2001/XMLSchema" name="NetbiosComputerName" type="xsd:string"/>
<xsd:element xmlns:xsd="http://www.w3.org/2001/XMLSchema" name="InstanceName" type="xsd:string"/>
<xsd:element xmlns:xsd="http://www.w3.org/2001/XMLSchema" name="DatabaseName" type="xsd:string"/>
<xsd:element xmlns:xsd="http://www.w3.org/2001/XMLSchema" name="WarningThreshold" type="xsd:double"/>
<xsd:element xmlns:xsd="http://www.w3.org/2001/XMLSchema" name="CriticalThreshold" type="xsd:double"/>
<xsd:element xmlns:xsd="http://www.w3.org/2001/XMLSchema" name="ConnectionString" type="xsd:string"/>
<xsd:element xmlns:xsd="http://www.w3.org/2001/XMLSchema" name="InstanceVersion" type="xsd:string"/>
<xsd:element xmlns:xsd="http://www.w3.org/2001/XMLSchema" name="InstanceEdition" type="xsd:string"/>
<xsd:element xmlns:xsd="http://www.w3.org/2001/XMLSchema" name="IntervalSeconds" type="xsd:integer"/>
<xsd:element xmlns:xsd="http://www.w3.org/2001/XMLSchema" name="SyncTime" type="xsd:string"/>
<xsd:element xmlns:xsd="http://www.w3.org/2001/XMLSchema" name="TimeoutSeconds" type="xsd:integer"/>
<xsd:element xmlns:xsd="http://www.w3.org/2001/XMLSchema" name="SqlExecTimeoutSeconds" type="xsd:integer"/>
<xsd:element xmlns:xsd="http://www.w3.org/2001/XMLSchema" name="SqlTimeoutSeconds" type="xsd:integer"/>
</Configuration>
<OverrideableParameters>
<OverrideableParameter ID="IntervalSeconds" Selector="$Config/IntervalSeconds$" ParameterType="int"/>
<OverrideableParameter ID="TimeoutSeconds" Selector="$Config/TimeoutSeconds$" ParameterType="int"/>
<OverrideableParameter ID="WarningThreshold" Selector="$Config/WarningThreshold$" ParameterType="int"/>
<OverrideableParameter ID="CriticalThreshold" Selector="$Config/CriticalThreshold$" ParameterType="int"/>
<OverrideableParameter ID="SqlExecTimeoutSeconds" ParameterType="int" Selector="$Config/SqlExecTimeoutSeconds$"/>
<OverrideableParameter ID="SqlTimeoutSeconds" ParameterType="int" Selector="$Config/SqlTimeoutSeconds$"/>
</OverrideableParameters>
<MonitorImplementation>
<MemberModules>
<DataSource ID="DS" TypeID="Microsoft.SQLServer.Linux.DataSource.VLFCount">
<MachineName>$Config/MachineName$</MachineName>
<NetbiosComputerName>$Config/NetbiosComputerName$</NetbiosComputerName>
<InstanceName>$Config/InstanceName$</InstanceName>
<DatabaseName>$Config/DatabaseName$</DatabaseName>
<ConnectionString>$Config/ConnectionString$</ConnectionString>
<InstanceVersion>$Config/InstanceVersion$</InstanceVersion>
<InstanceEdition>$Config/InstanceEdition$</InstanceEdition>
<IntervalSeconds>$Config/IntervalSeconds$</IntervalSeconds>
<SyncTime>$Config/SyncTime$</SyncTime>
<TimeoutSeconds>$Config/TimeoutSeconds$</TimeoutSeconds>
<SqlExecTimeoutSeconds>$Config/SqlExecTimeoutSeconds$</SqlExecTimeoutSeconds>
<SqlTimeoutSeconds>$Config/SqlTimeoutSeconds$</SqlTimeoutSeconds>
</DataSource>
<ConditionDetection ID="NormalCondition" TypeID="System!System.ExpressionFilter">
<Expression>
<And>
<Expression>
<SimpleExpression>
<ValueExpression>
<XPathQuery Type="Double">Property[@Name='VLFCount']</XPathQuery>
</ValueExpression>
<Operator>Less</Operator>
<ValueExpression>
<Value Type="Double">$Config/WarningThreshold$</Value>
</ValueExpression>
</SimpleExpression>
</Expression>
<Expression>
<SimpleExpression>
<ValueExpression>
<XPathQuery Type="Double">Property[@Name='VLFCount']</XPathQuery>
</ValueExpression>
<Operator>Less</Operator>
<ValueExpression>
<Value Type="Double">$Config/CriticalThreshold$</Value>
</ValueExpression>
</SimpleExpression>
</Expression>
</And>
</Expression>
</ConditionDetection>
<ConditionDetection ID="WarningCondition" TypeID="System!System.ExpressionFilter">
<Expression>
<And>
<Expression>
<SimpleExpression>
<ValueExpression>
<XPathQuery Type="Double">Property[@Name='VLFCount']</XPathQuery>
</ValueExpression>
<Operator>Less</Operator>
<ValueExpression>
<Value Type="Double">$Config/CriticalThreshold$</Value>
</ValueExpression>
</SimpleExpression>
</Expression>
<Expression>
<SimpleExpression>
<ValueExpression>
<XPathQuery Type="Double">Property[@Name='VLFCount']</XPathQuery>
</ValueExpression>
<Operator>GreaterEqual</Operator>
<ValueExpression>
<Value Type="Double">$Config/WarningThreshold$</Value>
</ValueExpression>
</SimpleExpression>
</Expression>
</And>
</Expression>
</ConditionDetection>
<ConditionDetection ID="ErrorCondition" TypeID="System!System.ExpressionFilter">
<Expression>
<SimpleExpression>
<ValueExpression>
<XPathQuery Type="Double">Property[@Name='VLFCount']</XPathQuery>
</ValueExpression>
<Operator>GreaterEqual</Operator>
<ValueExpression>
<Value Type="Double">$Config/CriticalThreshold$</Value>
</ValueExpression>
</SimpleExpression>
</Expression>
</ConditionDetection>
</MemberModules>
<RegularDetections>
<RegularDetection MonitorTypeStateID="Normal">
<Node ID="NormalCondition">
<Node ID="DS"/>
</Node>
</RegularDetection>
<RegularDetection MonitorTypeStateID="Warning">
<Node ID="WarningCondition">
<Node ID="DS"/>
</Node>
</RegularDetection>
<RegularDetection MonitorTypeStateID="Error">
<Node ID="ErrorCondition">
<Node ID="DS"/>
</Node>
</RegularDetection>
</RegularDetections>
</MonitorImplementation>
</UnitMonitorType>