Server 2022  - two servers on same LAN with 20GB connectivity - 100GB staging on each - still seeing this: The DFS Replication version vector size has exceeded acceptable limits.  A large version vector size could cause degraded DFS replication performance, poor responsiveness of DFS replication management operations,  and excessive memory and CPU resource consumption. Contact Customer Support Services to analyze the overall health of your DFS Replication deployment. 

Log Name:      DFS Replication
Source:        DFSR
Date:          12/3/2022 1:17:02 AM
Event ID:      1315
Task Category: None
Level:         Warning
Keywords:      Classic
User:          N/A
Computer:      server 1
Description:
The DFS Replication version vector size has exceeded acceptable limits.  A large version vector size could cause degraded DFS replication performance, poor responsiveness of DFS replication management operations,  and excessive memory and CPU resource consumption. Contact Customer Support Services to analyze the overall health of your DFS Replication deployment. 

Event Xml:

 
   
    1315
    0
    3
    0
    0
    0x80000000000000
   
    3343
   
   
    DFS Replication
    server1
   
 
 
 

You need a serious staging file size for that, especially if you have put all of the folders in one replication group. I am saying 128Gb might be enough but maybe 256Gb.