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)

No files, tests, or entry points are identified in the issue. Start by locating the existing maximum-file-count and lifespan cache settings, then trace the eviction path. Done means supporting a maximum size in megabytes and removing the oldest cached files, as needed, before adding a new file would exceed that limit.

索引モデルが issue の本文から書いたものです。