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Dynamics 365 Community / Forums / Small and medium business | Business Central, N... / Performance Degraded a...
Small and medium business | Business Central, N...
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Performance Degraded after using Modern Search.

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Posted on by RJ-26112143-0 6
Hello Experts,
 
I am facing performance issue while using Modern Search in BC 25.6 On-prem. 
We enabled feature for a customer ahead of upgrade to see the impact and we are facing issue while using Modern Search on Vendor List with only 100k records.
To my surprise, it is working perfectly fine with Legacy Search. 
 
Any suggestions or configurations to make in BC or SQL to improve performance?
 
Categories:
Dynamics 365 Business Central
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  • Suggested answer
    Assisted by AI
    OussamaSabbouh Profile Picture
    OussamaSabbouh 11,612 Super User 2026 Season 1 on at
    Hello,
     
    Your Sync-NAVTenant fails because SQL is blocking the schema sync on your huge 330-GB DB.
    It waits for hours, hits a lock timeout, and BC reports “SQL Server connection is no longer available”.
    Fixes that usually work:
    Stop all BC/NAV services and make sure no other session touches the DB.
    Disable SQL jobs during sync.
    Run with:
    Sync-NAVTenant -ServerInstance BC252 -Tenant default -Mode Sync -CommitPerTable

    Increase DatabaseLockTimeout and SQLCommandTimeout on the BC 25 service.
    After that, the sync normally completes.
     
    Regards,
    Oussama Sabbouh
  • Gerardo Rentería García Profile Picture
    Gerardo Rentería Ga... 25,547 Most Valuable Professional on at

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