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MERGE DELTA in SAP HANA

Posted on Jul 11, 2012 at 08:04 AM 4.5k Views

Hi Experts,

Could you please explain about Merge Delta in HANA.

Give me some example about this

Regards,

Siva

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    author's profile photo Ravindra Channe
    Ravindra Channe
    Posted on Jul 11, 2012 at 09:28 AM
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    Hi Sivakumar,

    In simple terms, DELTA merge is an operation to move the data from WRITE optimized DELTA memory to READ optimized and Compressed MAIN memory.

    This can be done automatically by HANA using Smart Merge technology or manually using MERGE DETLA OF sql statement or using right click option on HANA studio.

    You can see check the values in M_CS_COLUMNS view for the memory_size_in_total, memory_size_in_main and memory_size_in_delta BEFORE and AFTER delta merge to see the difference.

    Regards,

    Ravi

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  • author's profile photo Former Member
    Former Member
    Posted on Jul 11, 2012 at 09:07 AM
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    Hi,

    There is a nice document that explains the merge delta process, why it is required and how it is done.

    http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/10681c09-6276-2f10-78b8-986c68efb9c8?QuickLink=index&overridelayout=true&54563264554327

    Thanks,

    Anooj

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  • author's profile photo Former Member
    Former Member
    Posted on Aug 02, 2016 at 05:12 AM
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    This message was moderated.

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