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Logical page in database is already hashed

Microsoft.SQLServer.2012.Logical_page_in_database_is_already_hashed_1_5_Rule (Rule)

Knowledge Base article:

Summary

This error occurs when Microsoft® SQL Server™ attempts to hash the logical page %S_PGID of database ID%d, and the page is already in the SQL Server hash table.

This error usually occurs as a side effect of other data errors that can usually be detected by executing DBCC CHECKDB without a repair clause.

Resolutions

Review the SQL Server error log, and then execute DBCC CHECKDB with the appropriate repair clause on the database. If the error involves an index page, use the REPAIR_REBUILD clause. If the error involves a data page, it may be necessary to use the REPAIR_ALLOW_DATA_LOSS clause. In the likely event that you cannot allow the loss of data, you will need to restore from a known clean backup. If the problem persists, contact your primary support provider. Have the output from DBCC CHECKDB available for review.

Important: If executing DBCC CHECKDB with one of the repair clauses does not correct the index problem, or if you are unsure what effect DBCC CHECKDB with a repair clause has on your data, contact your primary support provider.

Verify with your hardware vendor that the disk subsystem being used by SQL Server is at the currently supported and recommended firmware and hardware levels.

If DBCC CHECKDB finds no errors, or if errors are found and corrected so that subsequent DBCC statements indicate no errors, but this error reoccurs, contact your primary support provider. Have the SQL Server error logs and the output from DBCC CHECKDB and sp_configure available for review.

Overrideable Parameters

Name

Description

Default Value

Enabled

Enables or disables the workflow.

Yes

Priority

Defines Alert Priority.

1

Severity

Defines Alert Severity.

1

Element properties:

TargetMicrosoft.SQLServer.2012.DBEngine
CategoryEventCollection
EnabledTrue
Event_ID813
Event Source$Target/Property[Type="SQL!Microsoft.SQLServer.DBEngine"]/ServiceName$
Alert GenerateTrue
Alert SeverityWarning
Alert PriorityNormal
RemotableTrue
Alert Message
Logical page in database is already hashed
{0}
Event LogApplication
CommentMom2012ID='{1DEC4754-8DE3-475E-AE58-EE2760B8F1C5}';MOM2012GroupID={467ECC75-C5DA-42BD-955C-A73BBB51AF74}

Member Modules:

ID Module Type TypeId RunAs 
_F6DA1507_12AF_11D3_AB21_00A0C98620CE_ DataSource Microsoft.Windows.EventProvider Microsoft.SQLServer.SQLDefaultAccount
GenerateAlert WriteAction System.Health.GenerateAlert Default

Source Code:

<Rule ID="Microsoft.SQLServer.2012.Logical_page_in_database_is_already_hashed_1_5_Rule" Target="SQL2012Core!Microsoft.SQLServer.2012.DBEngine" Enabled="true" ConfirmDelivery="true" Remotable="true" Comment="Mom2012ID='{1DEC4754-8DE3-475E-AE58-EE2760B8F1C5}';MOM2012GroupID={467ECC75-C5DA-42BD-955C-A73BBB51AF74}">

  <Category>EventCollection</Category>

  <DataSources>

    <DataSource ID="_F6DA1507_12AF_11D3_AB21_00A0C98620CE_" Comment="{F6DA1507-12AF-11D3-AB21-00A0C98620CE}" TypeID="Windows!Microsoft.Windows.EventProvider" RunAs="SQL!Microsoft.SQLServer.SQLDefaultAccount">

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

      <LogName>Application</LogName>

      <Expression>

        <And>

          <Expression>

            <SimpleExpression>

              <ValueExpression>

                <XPathQuery>PublisherName</XPathQuery>

              </ValueExpression>

              <Operator>Equal</Operator>

              <ValueExpression>

                <Value>$Target/Property[Type="SQL!Microsoft.SQLServer.DBEngine"]/ServiceName$</Value>

              </ValueExpression>

            </SimpleExpression>

          </Expression>

          <Expression>

            <SimpleExpression>

              <ValueExpression>

                <XPathQuery>EventDisplayNumber</XPathQuery>

              </ValueExpression>

              <Operator>Equal</Operator>

              <ValueExpression>

                <Value>813</Value>

              </ValueExpression>

            </SimpleExpression>

          </Expression>

        </And>

      </Expression>

    </DataSource>

  </DataSources>

  <WriteActions>

    <WriteAction ID="GenerateAlert" TypeID="SystemHealth!System.Health.GenerateAlert">

      <Priority>1</Priority>

      <Severity>1</Severity>

      <AlertMessageId>$MPElement[Name="Microsoft.SQLServer.2012.Logical_page_in_database_is_already_hashed_1_5_Rule.AlertMessage"]$</AlertMessageId>

      <AlertParameters>

        <AlertParameter1>Event ID: $Data/EventDisplayNumber$. $Data/EventDescription$</AlertParameter1>

      </AlertParameters>

      <Suppression>

        <SuppressionValue/>

      </Suppression>

    </WriteAction>

  </WriteActions>

</Rule>