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Dynamics 365 Community / Forums / Finance | Project Operations, Human Resources, ... / Isolation Level in AX ...
Finance | Project Operations, Human Resources, ...
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Isolation Level in AX 2012 R3 CU12

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Posted on by Community Member

This past few weeks my company experience high locking and blocking in database which cause performance issue.

After we engage with database expert, they found there different isolation level between database and transaction that AX generate.

The database using Read-Commited Snapshot Isolation Level (RCSI), but the transaction using Read-Commited Isolation Level.

Has anyone know which isolation level that recommended to use ? And why is it recommended ?

And how to change Isolation Level in AX Configuration ?

  • Etienne Huhl Profile Picture
    Etienne Huhl 75 on at
    RE: Isolation Level in AX 2012 R3 CU12

    Hi Thomas,

    I think that this article works for you docs.microsoft.com/.../ms188277(v=sql.105)

    Read committed isolation using row versioning provides statement-level read consistency. As each statement within the transaction executes, a new data snapshot is taken and remains consistent for each statement until the statement finishes execution.

  • Community Member Profile Picture
    Community Member on at
    RE: Isolation Level in AX 2012 R3 CU12

    Hi Nikolaos,

    Thank you for your response.

    In article that you mentioned, Microsoft recommend to use RCSI in AX database and how to change it in database, but they don't mentioned how to also change it in AOS.

    They also did not mention what benefit AX will gain using RCSI instead using other isolation level.

  • Suggested answer
    nmaenpaa Profile Picture
    nmaenpaa 101,158 Moderator on at
    RE: Isolation Level in AX 2012 R3 CU12

    docs.microsoft.com/.../configure-sql-server-and-storage-settings

    So, in the database settings you should "Set READ_COMMITTED_SNAPSHOT to on."

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