The settings are in

Settings > Transfers > Files

Peer read caching Options are:
Direct Reads
Batching
Strong batching
Predictive (default)
Strong predictive
64 KB blocks
128 KB blocks
256 KB blocks
512 KB blocks
1 MB blocks
2 MB blocks
4 MB blocks
8 MB blocks


Can someone please explain what are these settings ? I cant find any description about it.