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Add “WITH(NOLOCK)” possibility in the Classificator sample gathering SQL

The Classificator has only read privilege in the Customer Database, just reading sample rows from the table(s). In a heavily used MSSQL environment, the Classificator SQL’s running time can be very large, and because of the locks, can be interference/blocks tables and business processes/applications. For the read SQLs it is enough the Uncommited READ Transaction Isolation Level, it can be specify using “with(nolock)” option. The previous SQL is using this option “with(nolock)”, but the following (the actual) SQL (that querying the sample records) does not contains it.

Add a possibility to use this option, this possibility can be for example an additional advanced checkbox, where it can be enable.

  • Guest
  • Jul 25 2022
  • Delivered
  • Admin
    6 Dec 06:11am

    Support for this request is delivered with Guardium Data Protection v11.4 patch bundle p460 which is available in Fix Central.


    Data Security - Product Management

  • Admin
    20 Sep 07:48pm

    This request is planned to be addressed with a patch update for Guardium Data Protection v11.4 and v11.5 in the near future.


    Data Security Product Management Team

  • Guest commented
    10 Aug 07:25am

    Our main goal is to use Read Uncommited Transaction Isolation Level with this Sample collecting SQL statement too. Because the Classification Process is “just reading” during the running time, and this Read Uncommited level provides the less blockades, most parallelization, less locks.Andrzej (the Customer MSSQL DBA) is highlighted, in the MSSQL the HINT and the SET statement in some cases can be a different (from transaction isolation level point of view), because the HINT is just a suggestion to the MSSQL Optimizer, but the SET is choosing the proper level.

    We have two pictures from the DBA that came from the trace and show the differences between the HINT and the SET, see the tran_isolation_level column.

    We would like to ask you, to use the SET.

    Because the usage of the “SET TRANSACTION ISOLATION LEVEL READ UNCOMMITED;” additional statement is better way than the “WITH (NOLOCK)” hint at the end of the original statement.

  • Admin
    5 Aug 10:37pm

    Hello, thank you for submitting your idea / request for enhancement for Guardium Data Protection!

    We are reviewing this request, we will get back to you with our findings.


    Data Security - Product Management

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