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How to prevent Microsoft SQL Agent backups from locking up the SQL or backups?

  • November 25, 2025
  • 8 comments
  • 50 views

I understand from our network team, that the SQL agent running on Microsoft SQL 2019 causes the SQL server to lockup or the backups to lockup.

 

Is there a method to configure the backups (data & logs) to prevent that?

8 comments

coolsport00
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  • Veeam Legend
  • November 25, 2025

I’ve not heard of this before ​@KclsJde . What kind of backups are you running? Veeam Agent for Windows on physical SQL servers? Or, are you using VBR backing up SQL VMs? Can you provide more info?

Thanks.


  • Author
  • New Here
  • November 25, 2025

We are not running the agent as of now.  Through own network team I heard that there is a previously reported problem in doing so.  I am wanting to move that direction rather than relying on backing up Microsoft .BAK’s on the hard disk drive and not knowing if the backups actually ran.


coolsport00
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  • Veeam Legend
  • November 25, 2025

Well...still not entirely sure of the question then ​@KclsJde . The Veeam “agent” is really nothing more than a service which Veeam uses pretty much on all its components → the Veeam Transport Service. I have not heard this service locking SQL services. By SQL backups, are you saying you currently use native SQL tools to backup SQL? Veeam has a SQL plugin you can use on your SQL server which basically just allows you to backup your SQL to a Veeam repository, but while using native SQL backup tools.

If there’s some more specific question you’re looking to get info on, let me know.

Thanks.


Chris.Childerhose
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  • Veeam Legend, Veeam Vanguard
  • November 25, 2025

Also the Veeam Agent (Windows Agent) if installed should be using VSS for SQL to create backups and not affect it at all.

To me this sounds like something you may want to open a support ticket on to get to the bottom of.


  • Author
  • New Here
  • November 25, 2025

Thanks for the details.

I will gather some data in the near future.


coolsport00
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  • Veeam Legend
  • November 26, 2025

Sure...no problem. Let us know if you need further info.


Chris.Childerhose
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  • Veeam Legend, Veeam Vanguard
  • December 23, 2025

@KclsJde  - were you able to find the answer to your question asked and if so please mark the best answer even if it happens to be your own.  This will help other community members who may have the same question.


Marcel.K
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  • Veeam Legend
  • December 24, 2025

Locking up you probably means that during backup is database in read-only mode/maintenance mode.

You cannot avoid that, because otherwise you cannot have consistent backup of it.

During creation of snapshot of VM, VSS writers with create snapshot of database and durin g this process is put database into readonly mode to avoid any changes.

If you have clients, which cannot during that time to reach server, I would suggest to increase timeout on application servers side and put schedule of backup time, when is almost not used ...