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Description:
This property specifies the amount of off-heap memory per executor when jobs are executed using Spark. Kyvos delegates this property value to the same-named property of Spark when Kyvos submits a dataset build, cube build, or data profile job to Spark.

Values and behavior:

Any positive integer (represents value in MB).

For example: 6144

Default value:
6144: This means 6144 MB memory will be allocated to each Spark executor as the off-heap memory.

Scope:

  • Connection: If the property is set at the connection then the property value is applicable for all dataset build, cube build, or data profile jobs launched using Spark.
  • Cube: If the property is set on a cube, then the value will override the connection level value for that cube’s build job.
  • Dataset: If the property is set on a dataset then the value will override cube level value for that cube’s dataset build job.

NOTE: If the property is set on a dataset and a dataset is built, then the value will override the connection level value for that dataset build job.

Comes into effect:

This property comes into effect only when kyvos.build.execution.engine is set as Spark. This means when the underlying build engine is set as Spark. The value of the property can be changed at any time and will be respected in the next build.

Dependencies and related properties:

Recommendation:

The default value of the property should work fine for most scenarios. If the cube build jobs fail due to physical memory-related failures, then the job memory can be increased using this property. The values are recommended to be in the range of 4096 to 8192.

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