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    Chapter 23. Locking DB2 Data > Locks Versus Latches

    Locks Versus Latches

    A true lock is handled by DB2 using the IRLM. However, whenever doing so is practical, DB2 tries to lock pages without going to the IRLM. This type of lock is called a latch.

    True locks are always set in the IRLM. Latches, by contrast, are set internally by DB2, without going to the IRLM.


      

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