Very Slow Client Backup (50 KBit/s)

To summarize the reasons for slow backups previously mentioned in this thread:

Other reasons:

  • This can also happen if your server is slow, e.g. because your file system on the server is slow for small files (e.g. XFS) or you have an on-access virus scanner active on the server
  • Having backup with background priority enabled causes slow backup speed on some e.g. laptops with energy saving modes enabled.
  • Some people had to change Windows TCP settings. Disabling new congestion control algorithms or disabling TCP offloading