There are many different reasons why the OutOfMemory error may be thrown. For instance, you may be importing a huge amount of data, the row size of the imported data is very big, you are doing large aggregations, or memory swapping is be disabled. More information about configuring Denodo to handle large datasets can be found on the [Configuring the Memory Usage and Swapping Policy](https://community.denodo.com/docs/html/browse/latest/vdp/administration/server_administration_-_configuring_the_server/configuring_the_memory_usage_and_swapping_policy/configuring_the_memory_usage_and_swapping_policy) page of the Denodo Platform 7.0 User Manual.
If you can, I recommend that you open a support case so that the Support Team can investigate the issue.
Hope this helps!