Data Sizing 

  • The number of registered firmware versions has the largest impact on the size of the database.  
    (Listed in UMS Console under Misc > Firmware Statistics)
  • The number of devices or profiles has a minor impact.
  • Average size per... 
    • Firmware configuration: ~15 MB 
    • Profile (depends on the number of active parameters): ~100 kB 
    • Device: ~100 kB
  • Reserve 500 MB up to 1 GB for database transaction logs of excessive database calls like Remove unused Firmware. Please note that the usage depends on the database system used.    


If you are struggling with long-distance connections and high latency, please consider the following recommendations: 

  • Minimize latency between...  
    • Database <-> UMS Server<= 20 ms
    • Several UMS Servers: <= 50 ms
    • Load balancer <-> UMS Server: <= 50 ms 
  • High latency between the database and the UMS Server has a huge impact on the performance. The communication between the device and the UMS Console will slow down, the UMS Console itself will become lazy.
  • High latency between the device and the UMS Server has little impact on overall performance. 

Performance Optimizations 

  • UMS logs:  
    Use administrative tasks to automatically clean up logs (logging data, job execution data, execution data of administrative tasks, process events, asset information history) or remove old UMS log files (/rmguiserver/logs when storage space runs out.
  • Firmware:  
    Remove unused firmware regularly.
  • Embedded database only:  
    • Optimize database regularly (UMS Administrator application, e.g. once a month)
    • Check for free storage space and expand the storage size if necessary (keep at least 1 GB free at all times)
  • Number of devices:  
    • If the device count is high (>10k) and overall performance is low, increase UMS Server and UMS Console memory.
    • Avoid too many devices (>5k) in one folder.
  • Assignments:  
    Keep the number of assignments per device (direct and indirect) at a low level (<25).
  • Default directory rules:  
    Do not use default directory rules with the Apply rule when device boots option unless they are required.

Concurrent device requests: 
If you are experiencing problems with many concurrent device requests (delays in configuration deployment or logging on to the device), open the UMS Console and use the options under UMS Administration > Global Configuration > Device Network Settings > Device Requests  (thread and queue size) to control the throughput of the device requests. Contact support for recommendations. 

Limitations: UMS HA 

  • Device actions that are manually triggered in the UMS Console are performed by one UMS Server (the one the UMS Console is currently connected to); there is no load balancing for these actions.