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An bloated configuration database is a primary catalyst for metadata overflow bugs.
If you are still using legacy Microsoft SQL Server Express editions, migrate to PostgreSQL (supported natively in newer Veeam versions) to eliminate the 10 GB database size ceiling and improve scale handling.
If you want, I can generate a ready-to-copy support case message including the details above; paste any specific error text or logs you have and I’ll format it. veeam backup and replication overflow error
Update VMware Tools or Hyper-V Integration Services on the target virtual machines to prevent malformed metadata generation. Step 5: Adjust Registry Keys for Buffer Allocations
The Linux machine being backed up has a high rate of data change (I/O) that fills up the snapshot delta file faster than Veeam can process it. The Fix:
Disabling and re-enabling CBT flushes out corrupted or oversized block counters on the hypervisor side. This public link is valid for 7 days
The overflow error can manifest in various ways, including:
What is the surrounding the overflow message in your logs?
The "Overflow" error in Veeam Backup & Replication typically indicates that a variable, counter, or memory allocation has exceeded its maximum allowable value. This issue commonly surfaces during large-scale backup jobs, extensive replication cycles, or metadata-heavy repository operations. Common Root Causes Can’t copy the link right now
SELECT name, Auto_Seed, Auto_Increment, Max_Value FROM sys.identity_columns WHERE object_id = OBJECT_ID('Backup.Model.BackupSessions')
Clear temp files, logs, or unnecessary data on the affected volume. Ideally, keep 15-20% of free space on active volumes. 2. Identify High-Churn Processes
or large data calculations that exceed standard integer limits. Update VBR:
Identify the component throwing the error (e.g., Veeam.Backup.DBManager , Veeam.Backup.Core , or a database driver). Step 3: Check Disk and Database Metrics