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Memory Consumption of Qlik Replicate increases unexpectedly

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Memory Consumption of Qlik Replicate increases unexpectedly

Last Update:

Jun 29, 2023 6:46:24 AM

Updated By:


Created date:

Jun 29, 2023 6:46:24 AM

Qlik Replicate consumes more memory than expected. This article is meant to give a basic understanding of what best practices we can recommend.


  1. We recommend checking the max LOB column length in the table and adding it to the LOB size in task settings. 

    1. Run the below sample query in the database to get the max lob column length:


    2. In the task settings, go to Metadata and open Target Metadata. Set the Limit LOB size to (KB) based on your above findings. 

      limit lob.png

    3. In addition, we recommend increasing memory based on load and monitor. Resource bottlenecks can lead to eventual task failures or impact reliability. If you need assistance with hardware sizing, our professional services can assist you. 
    4. We also recommend adding primary keys in the source DB if not already present.
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Last update:
‎2023-06-29 06:46 AM
Updated by: