I have a few questions about the "oc_filecache" table

Hello, I have a few questions about the ā€œoc_filecacheā€ table:

  1. Is the ā€œoc_filecacheā€ table stored temporarily or permanently? Because the table name ā€œfilecacheā€ makes me confused. I feel that it is the meaning of file cache, so I want to get an authoritative answer.

  2. May I ask if some files exist in the hard disk but do not exist in the ā€œoc_filecacheā€ table? If this happens, how should I recover and solve it?

Duplicate A few questions about the "oc_filecache" table