VDI Performance Degradation due to SolidFire Node Overutilization and QoS Pushback
Applies to
- SolidFire (Element OS 12.8 )
- NetApp HCI (H615C, H610S-4, H610S-2, H610S-1 nodes)
Issue
- The environment experiences severe performance degradation, with high storage-induced latencies observed on ESXi hosts. Analysis of SolidFire cluster logs and Active IQ shows multiple nodes consistently exceeding 150% utilization, triggering QoS pushback and node throttling mechanisms. As a result, VDI sessions become unresponsive or fail to launch.
- Relevant Log Output:
Pushback on SliceService: 1832025-11-10 01:40:35.175929 SSLoad: 53.53572025-11-10 01:43:35.208267 SSLoad: 55.1607iSCSIEvent:iSCSI session count of 764 exceeds supported limit of 700 sessions per node- NodeIDX is running at 80.842 percent of full utilization for the last 60 minutes.