MSSQL on Linux: I/O request taking longer than 15 seconds to complete

Microsoft.SQLServer.Linux.EventRule.DBEngine.IORequestsTakingLongerThen15SecondsToComplete (Rule)

I/O request has taken longer than 15 seconds to complete. This may indicate an SQL Server I/O bottlenecks. SQL Server performance highly relies on the disk performance. Note: this rule is disabled by default. Please use overrides to enable it when necessary.

Knowledge Base article:

Summary

Causes

SQL Server is spawning more I/O requests than what I/O disk subsystem could handle.
There could be an Issue with I/O subsystem (or) driver/firmware issue (or) Misconfiguration in I/O Subsystem (or) Compression and so the Disks are performing very slowly and hence SQL Server is affected.
Some other process on the system is saturating the disks with I/O requests. Common application includes AV Scan, System Backup etc. Therefore, I/O requests posted by SQL Server become slow.

Resolutions

Exclude SQL Server files from antivirus scan.
Do not place SQL Server FILES on compressed drives.
Distribute SQL Server data files and transaction log files across drives.
If the “I/O request taking longer” warning is for tempdb, enable trace flag 1118 and increase the tempdb data files, refer to http://support.microsoft.com/kb/2154845
If none of the above resolves the issue, collect the below perfmon counters.

Element properties:

Target

Microsoft.SQLServer.Linux.DBEngine

Category

EventCollection

Enabled

False

Alert Generate

True

Alert Severity

Warning

Alert Priority

Normal

Remotable

True

Alert Message

MSSQL on Linux: I/O request has taken longer than 15 seconds to complete

{0}

Comment

Mom2017ID='{ACF21E73-7DD4-4899-A1BF-5BCBACF479EF}';MOM2017GroupID={467ECC75-C5DA-42BD-955C-A73BBB51AF74}

Member Modules:

ID	Module Type	TypeId	RunAs
_F6DA1507_12AF_11D3_AB21_00A0C98620CE_	DataSource	Microsoft.SQLServer.Linux.DataSource.EventCollectionFiltered	Default
GenerateAlert	WriteAction	System.Health.GenerateAlert	Default

Source Code:

<Rule ID="Microsoft.SQLServer.Linux.EventRule.DBEngine.IORequestsTakingLongerThen15SecondsToComplete" Target="SqlDiscL!Microsoft.SQLServer.Linux.DBEngine" Enabled="false" ConfirmDelivery="true" Remotable="true" Comment="Mom2017ID='{ACF21E73-7DD4-4899-A1BF-5BCBACF479EF}';MOM2017GroupID={467ECC75-C5DA-42BD-955C-A73BBB51AF74}">

  <Category>EventCollection</Category>

  <DataSources>

    <DataSource ID="_F6DA1507_12AF_11D3_AB21_00A0C98620CE_" Comment="{F6DA1507-12AF-11D3-AB21-00A0C98620CE}" TypeID="Microsoft.SQLServer.Linux.DataSource.EventCollectionFiltered">

      <MachineName>$Target/Property[Type="SqlCoreLib!Microsoft.SQLServer.Core.DBEngine"]/MachineName$</MachineName>

      <InstanceName>$Target/Property[Type="SqlCoreLib!Microsoft.SQLServer.Core.DBEngine"]/InstanceName$</InstanceName>

      <ConnectionString>$Target/Property[Type="SqlCoreLib!Microsoft.SQLServer.Core.DBEngine"]/ConnectionString$</ConnectionString>

      <SqlTimeoutSeconds>15</SqlTimeoutSeconds>

      <TimeoutSeconds>200</TimeoutSeconds>

      <IntervalSeconds>300</IntervalSeconds>

      <SyncTime/>

      <EventDisplayNumber>833</EventDisplayNumber>

    </DataSource>

  </DataSources>

  <WriteActions>

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

      <Priority>1</Priority>

      <Severity>1</Severity>

      <AlertMessageId>$MPElement[Name="Microsoft.SQLServer.Linux.EventRule.DBEngine.IORequestsTakingLongerThen15SecondsToComplete.AlertMessage"]$</AlertMessageId>

      <AlertParameters>

        <AlertParameter1>Event ID: $Data/Property[@Name='EventID']$. $Data/Property[@Name='Message']$</AlertParameter1>

      </AlertParameters>

      <Suppression>

        <SuppressionValue/>

      </Suppression>

    </WriteAction>

  </WriteActions>

</Rule>