Is there a way to set maximum cache size (in megabytes)

We can set max number of cached files and a life span. But i could not find a way to set a maximum size limit.
If we can set lets say 300MB and we are at 250BM atm;
when a new 100MB file getting cahced, the oldest should be deleted (or more up to 50MB)

该 issue 中未确定任何文件、测试或入口点。首先定位现有的最大文件数和缓存生命周期设置，然后跟踪驱逐路径。完成的标准是支持以兆字节为单位的最大大小，并在添加新文件会超出该限制之前，按需删除最旧的缓存文件。

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