Centos 7 Server Overloads and hangs on Sync with 1 Gbit connection

I need Help concerning a fresh owncloud server installed on a VPS CentOS 7 Server , i need a general answer for a general question. Is it possible the owncloud server to hang the entire VPS when starting to sync from a client that is trying to sync 2205 Files that range from several kbs to 3,6GB in size? Both client and Server utilize a 1Gbps Connection. When starting syncing the server overloads cpu and ssd and the hangs. I have a 10cpu + 50gb ram + 1.2TB SSD VPS Server running Centos 7.