Help Center/ MapReduce Service/ User Guide (Kuala Lumpur Region)/ MRS Cluster Component Operation Gudie/ Using Spark2x/ Basic Operation/ Scenario-Specific Configuration/ Configuring Executor Off-Heap Memory

Updated on 2022-08-12 GMT+08:00

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Configuring Executor Off-Heap Memory

Scenario

When the executor off-heap memory is too small, or processes with higher priority preempt resources, the physical memory usage will exceed the maximal value. To prevent the physical memory usage from exceeding, set the following parameter.

Configuration

Navigation path for setting parameters:

When submitting an application, set the following parameter using --conf or adjust the parameter in the spark-defaults.conf configuration file on the client.

**Table 1** Parameter description
Parameter	Description	Default Value
spark.executor.memoryOverhead	Indicates the off-heap memory of each executor, in MB. Increasing the value of this parameter prevents the physical memory usage from exceeding the maximal value. The value is calculated based on max(384, Executor – Memory x 0.1). The minimal value is 384.	1024

Parent topic: Scenario-Specific Configuration

Previous topic: Configuring the Size of the Event Queue

Next topic: Enhancing Stability in a Limited Memory Condition

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