Under the following mount params:
--attr-timeout 1w --dir-cache-time 1w --poll-interval 1h --use-mmap --no-checksum --no-modtime --read-only --vfs-cache-mode full --vfs-cache-max-age 1w
The documentation says vfs-cache-max-size will default to off so what happens when more data is accessed than the space on the local drive?