echart boundarygap

boundarygap失效怎么办啊 boundaryGap: [20%, 20%]和boundaryGap: true都没有效果

//数据：
let datat = [
                        [ "2020-10 15:22:34",  "1"],
                        [ "2020-11 15:22:34",  "1.3"],
                        [ "2020-12 15:22:34",  "1.3"],
                        [ "2021-01 15:22:34",  "1.3"],
                        [ "2021-02 15:22:34",  "1.7"],
                        [ "2021-03 15:22:34",  "1.6"],
                        [ "2021-04 15:22:34",  "1.3"],
                        [ "2021-05 15:22:34",  "1.5"],
                        [ "2021-06 15:22:34",  "1.5"],
                        [ "2021-07 15:22:34",  "1.9"],
                    ];

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使用上述数据时图标左右会留白，当使用后端传的数据时就会失效，这是为什么呀 初步怀疑是后端数据过多，怎么解决啊

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参考：https://blog.csdn.net/qq_35257117/article/details/89019931