presto-main/src/main/java/io/prestosql/execution/TaskManagerConfig.java/TaskManagerConfig/setMaxLocalExchangeBufferSize
class TaskManagerConfig:    @Config("task.max-local-exchange-buffer-size")
    public TaskManagerConfig setMaxLocalExchangeBufferSize(DataSize size)
    {
        this.maxLocalExchangeBufferSize = size;
        return this;
    }