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    <title>topic QVD Merge - RAM Issue in QlikView</title>
    <link>https://community.qlik.com/t5/QlikView/QVD-Merge-RAM-Issue/m-p/490061#M183096</link>
    <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;P&gt;Hi,&lt;/P&gt;&lt;P&gt;We follow a standard 3 Tier QVD Layered Architecture.The current combined size of all QVDs&amp;nbsp; is around 12GB.&lt;/P&gt;&lt;P&gt;Towards the end we have a step whereby we concatenate all the QVDs to create a STAR like data model.&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;We are observing that at the step where we concatenate all the QVDs, the memory usage is as high as 60GB for a period of 2 hours.&lt;/P&gt;&lt;P&gt;Admins have taken the drastic step of killing that job because of so high memory usage.&lt;/P&gt;&lt;P&gt;The Prod server is a clustered 2 machine setup with 64GB RAM each.&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;Please let me know from your project experiences:-&lt;/P&gt;&lt;P&gt;1) Is it normal for data contained in 12 GB QVD to use upto 60GB RAM while merging the QVDs.&lt;/P&gt;&lt;P&gt;2) What ways we can explore to bring down the memroy usage.&lt;/P&gt;&lt;P&gt;3) Or should we increase the RAM capacity in the Servers.&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;Cheers,&lt;/P&gt;&lt;P&gt;Anindya&lt;/P&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
    <pubDate>Thu, 20 Jun 2013 00:17:27 GMT</pubDate>
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    <dc:date>2013-06-20T00:17:27Z</dc:date>
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      <title>QVD Merge - RAM Issue</title>
      <link>https://community.qlik.com/t5/QlikView/QVD-Merge-RAM-Issue/m-p/490061#M183096</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;P&gt;Hi,&lt;/P&gt;&lt;P&gt;We follow a standard 3 Tier QVD Layered Architecture.The current combined size of all QVDs&amp;nbsp; is around 12GB.&lt;/P&gt;&lt;P&gt;Towards the end we have a step whereby we concatenate all the QVDs to create a STAR like data model.&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;We are observing that at the step where we concatenate all the QVDs, the memory usage is as high as 60GB for a period of 2 hours.&lt;/P&gt;&lt;P&gt;Admins have taken the drastic step of killing that job because of so high memory usage.&lt;/P&gt;&lt;P&gt;The Prod server is a clustered 2 machine setup with 64GB RAM each.&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;Please let me know from your project experiences:-&lt;/P&gt;&lt;P&gt;1) Is it normal for data contained in 12 GB QVD to use upto 60GB RAM while merging the QVDs.&lt;/P&gt;&lt;P&gt;2) What ways we can explore to bring down the memroy usage.&lt;/P&gt;&lt;P&gt;3) Or should we increase the RAM capacity in the Servers.&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;Cheers,&lt;/P&gt;&lt;P&gt;Anindya&lt;/P&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Thu, 20 Jun 2013 00:17:27 GMT</pubDate>
      <guid>https://community.qlik.com/t5/QlikView/QVD-Merge-RAM-Issue/m-p/490061#M183096</guid>
      <dc:creator />
      <dc:date>2013-06-20T00:17:27Z</dc:date>
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