Veeam Backup & Replication • Re: Server 2025 - high CPU and RAM

The ReFS memory exhaustion fix is expected from Microsoft in July for HCI23H2 and Windows Server 2025.

That's good news - if it works

FWIW I still can't run a backup (to an NTFS drive) becasue the ReFS bug hangs the server. It seems the 5ish Gb of ram left after ReFS takes it's bit (even when Veeam is disabled)
is not enough memory for a backup to a local NTFS volume.
I might get the opportunity to rob some RAM form another server next week and see if a few more Gb provides enough space for backups to run - it does seem that the ReFS bug maxes out at 90Gbish RAM in my use case. Its worth the downtime on the donor server I feel.

Statistics: Posted by BenM2024 — Jun 20, 2025 7:37 am

---