Hello fellows,
I did some migration in my test environment and observed that the amount of transmitted bytes raises despite my test VM was idle.
My test environment consist out of 3 nested ESXi hosts on one physical host. Each nested hosts has 2 vNIC. One for management and one for vMotion. I read out the statistics of the "vMotion-NICs" before an after the migration and calculated then the amount of transmitted data. The nested hosts are configured with 8 CPUs and 64GB memory (per nested host) and the test VM is an ubuntu server 24.04.2 LTS with 4 CPU and 8GB memory.
I wrote a PowerCLI script that resets the VM and then migrate it multiple times between the nested hosts. That script was executed every 3 hours last weekend and wrote the result in a csv-File. In the plot you can see that the amount of data raised over time and that there was more data received then send (but that's another topic). The reset of the VM has no affect, but if I reset the VM of the nested hots then the transmitted data drops. So my first guess was that it has something to do with log-files, so I disabled them, but that had no affect. After the reset of the nested hosts, the behavior is still the same. The data raise over time.
Has someone an idea why the amount of data raises and how can I configure my environment to stop the behavior?
PS: ESXi Version nested hosts: VMware ESXi 8.0.3, vCenter Server Version: 8.0.3.00400