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JacksonWearne's avatar
JacksonWearne
Regular Visitor
6 months ago
Solved

Power BI Report Server January 2026 – msmdsrv restarts, SQLDmpr files

Hi, We upgraded our Power BI Report Server to the January 2026 release and have been experiencing stability and performance issues that did not exist prior to the upgrade.   Since the upgrade, the...
"January 2026"
"Power BI Report Server "
  • ArwaAldoud's avatar
    ArwaAldoud
    6 months ago

     

    Hi JacksonWearne ,

    We experienced the same issue after upgrading to the January 2026 Power BI Report Server release (msmdsrv restarts and continuous SQLDmpr dump generation).

    We opened a support case with Microsoft, and they confirmed this is a known issue in this release. The product team is currently working on a fix.

    Temporary Workaround (from Microsoft Support)

    Until a fixed build is released, Microsoft advised deleting the generated mini dump files to prevent disk exhaustion:

    Default path:
    C:\Program Files\Microsoft Power BI Report Server\PBIRS\LogFiles

    Delete files ending with:
    .mdmp

    This is only a temporary mitigation and does not resolve the root cause.

    You can monitor the official PBIRS changelog for updates:
    https://learn.microsoft.com/power-bi/report-server/changelog

    If this response was helpful, please accept it as a solution and give kudos to support other community members

tayloramy's avatar
tayloramy
Icon for Super User rankSuper User
6 months ago

Hi JacksonWearne, 

 

Are you able to find anything in the gateway logs that might explain this? 

 

I just started a new job, but I had upgraded all 7 of my gateways at my previous job to Jan 2026  on January 26th (my upgrade schedule was the last monday of the month) and never saw any issues with it. 

 

What data sources are you primarily using? I was using mostly SQL Server and Oracle, could it perhaps be an issue with a specific connector? 

 

  • JacksonWearne's avatar
    JacksonWearne
    Regular Visitor
    6 months ago

    Hi tayloramy, 

     

    Thank you for your response! I only use SQL Server as my data source and everything is on-prem so I know this isn't a gateway issue.

     

    Thanks!