VNPY3.6在vnpy_ctastrategy/vnpy_ctabacktester的CTA策略模块执行参数优化时添加了最大进程数量限制参数max_workers,请教一下，这个参数具体怎么设置？ 然后设置最大可以是多少？最大线程数能超过63吗？

Windows系统上不能超过63，这个是由于Python进程池的Windows实现限制的，Linux则没有了。

一般建议用0就好，会直接基于你的CPU核心数量启动对应的进程，如果确实优化过程中发现内存不足程序崩溃了，那就设置核心数N/2试试看

哦哦，明白了，再咨询一下，您建议用0或者核心数N/2赋值，这个0或者核心数N/2需要在哪里赋值呢？是下面代码里面直接赋值还是其他设置里面？

def run_bf_optimization(
    self,
    optimization_setting: OptimizationSetting,
    output: bool = True,
    max_workers: int = None
) -> list:
    """"""
    if not check_optimization_setting(optimization_setting):
        return

    evaluate_func: callable = wrap_evaluate(self, optimization_setting.target_name)
    results: list = run_bf_optimization(
        evaluate_func,
        optimization_setting,
        get_target_value,
        max_workers=max_workers,
        output=self.output
    )

    if output:
        for result in results:
            msg: str = f"参数：{result[0]}, 目标：{result[1]}"
            self.output(msg)

    return results

run_optimization = run_bf_optimization

def run_ga_optimization(
    self,
    optimization_setting: OptimizationSetting,
    output: bool = True,
    max_workers: int = None
) -> list:
    """"""
    if not check_optimization_setting(optimization_setting):
        return

    evaluate_func: callable = wrap_evaluate(self, optimization_setting.target_name)
    results: list = run_ga_optimization(
        evaluate_func,
        optimization_setting,
        get_target_value,
        max_workers=max_workers,
        output=self.output
    )

    if output:
        for result in results:
            msg: str = f"参数：{result[0]}, 目标：{result[1]}"
            self.output(msg)

    return results

可以看下3.6.0的CtaBacktester，优化配置界面多了个进程数量的选项