z/OS

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z/OS

IBM z/OS is a widely-used mainframe operating system designed for a stable, secure and highly available environment for running mission-critical applications.

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Question regarding LFAREA versus no LFAREA

  • 1.  Question regarding LFAREA versus no LFAREA

    Posted 08/24/23 07:45 PM

    Hi,

    I just checked that prod DB2 is not configured to use LFAREA. or just using 4k pages.

    Based on RMF, DB2 does not have any virtual memory paged out or pretty much all of DB2 is paged in to real memory in the system.

    Would there be differences to these. Would there be overheads for z/OS (RSM/VSM overheads) by just using 4k pages versus LFAREA?

    Assuming that none of DB2 4k pages never get paged out. Or assuming, no paging activity is occurring for DB2. 

    Thanks, I very much appreciate your response. 

    Ed



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    ED TOBIAS
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