Oc_oc_filecache

Hi all 1st post
This isnt specific to a version as I have had the same for a few upgrades.
Currently doing 22 to 23.
I had always wondered why it was so slow.
using occ maintainence:repair I can see several oc_oc_filecache_******** entries as well as oc-filecache.
I cant seem to see or find any info on this.
I’ve probably done something wrong way back in the past!
Any clue - or can I just remove them?