Forum Discussion
Defender on file servers is making SMB file copy going modem speed
Hey all, Defender on our file servers (2016/2019) are doing something when client try to copy files from its file shares. Normal speed is 100-200 MBPS, but when the issue occurs it almost stops, ...
Björn Lagerwalldid you try to play around with ScanAvgCPULoadFactor - sanning options listed https://docs.microsoft.com/en-US/windows/security/threat-protection/microsoft-defender-antivirus/configure-advanced-scan-types-microsoft-defender-antivirus
Maybe that reduces some of the load during scanning and get's the I/O back.
BillTheKid Thanks, but any disk I/O issue has not been observed on either file server or client. Just that network copy speed drops randomly if shared folders on file server are not excluded.
Edit: Also, it's not during scans but Real-Time Protection that is the cause. (also the max cpu setting for scans are already set to 20%)
