The VMware Aria Operations collects the metrics you use to monitor the performance of your vSAN cluster.

VMware Aria Operations enhances the capacity calculation for vSAN, using the new slack space provided by the new vSAN API. Cost calculation is still done using the old way which reserves 30% memory for Slack Overhead.

Metrics for vSAN cluster include:
Component Metrics
Component Limit
  • vSAN|Component Limit|Component Limit Used (%)
  • vSAN|Component Limit|Total Component Limit
  • vSAN|Component Limit|Used Component Limit
Disk Space
  • vSAN|Disk Space|Disk Space Used (%)
  • vSAN|Disk Space|Total Disk Space (GB)
  • vSAN|Disk Space|Used Disk Space (GB)
  • vSAN|Disk Space|Usable Capacity (GB)
  • vSAN|Disk Space|Oversubscription Capacity (GB)
  • vSAN|Disk Space|Oversubscription Ratio
Note: The oversubscription metrics are applicable only for the vSAN OSA clusters.
Health vSAN|Health|Score
Read Cache
  • vSAN|Read Cache|Read Cache Reserved (%)
  • vSAN|Read Cache|Reserved Read Cache Size (GB)
  • vSAN|Read Cache|Total Read Cache Size (GB)
Performance
  • vSAN|Read Cache|Reads Per Second (IOPS)
  • vSAN|Read Cache|Read Throughput (KBps)
  • vSAN|Read Cache|Average Read Latency (ms)
  • vSAN|Read Cache|Writes Per Second (IOPS)
  • vSAN|Read Cache|Write Throughput (KBps)
  • vSAN|Read Cache|Average Write Latency (ms)
  • vSAN|Read Cache|Congestion
  • vSAN|Read Cache|Outstanding I/O
  • vSAN|Read Cache|Total IOPS
  • vSAN|Read Cache|Total Latency (ms)
  • vSAN|Read Cache|Total Throughput (KBps)
Deduplication And Compression Overview
  • vSAN|Deduplication And Compression Overview|Used Before
  • vSAN|Deduplication And Compression Overview|Used After
  • vSAN|Deduplication And Compression Overview|Savings
  • vSAN|Deduplication And Compression Overview|Ratio
Summary
  • Summary|Number of Storage Pools
  • Summary|Number of ESA Disks
  • Summary|Number of Cache Disks
  • Summary|Total Number of Capacity Disks
  • Summary|CPU Workload
  • Summary|Memory Workload
  • Summary|Total Number of Disk Groups
  • Summary|Total Active Alerts Count
  • Summary|Total Number of VMs
  • Summary|Total Number of Hosts
  • Summary|vSAN Cluster Capacity Remaining (%)
  • Summary|vSAN Cluster Storage Time Remaining
  • Summary|vSAN Capacity Disk Used
  • Summary | Total vSAN CPU Used (MHz)
  • Summary | Max vSAN CPU Ready
  • Summary | Worst VM Disk Latency
KPI

  • KPI|Max ESA Disk IOPS
  • KPI|Max ESA Disk Latency
  • KPI|Min Storage Pool Free Capacity
  • KPI|Sum Storage Pool Errors
  • KPI|Disk Groups Metrics
  • KPI|Sum Host VMKernel Packets Dropped
  • KPI|Count Disk Group Congestion Above 50
  • KPI|Max Disk Group Congestion
  • KPI|Sum Disk Group Errors
  • KPI|Min Disk Group Capacity Free
  • KPI|Min Disk Group Read Cache Hit Rate
  • KPI|Min Disk Group Write Buffer Free
  • KPI|Max Disk Group Read Cache/Write Buffer Latency
  • KPI|Max Capacity Disk Latency
  • KPI | Max Capacity Disk IOPS
IO Size

  • vSAN | Performance | I/O Size (KB)
  • vSAN | Performance | Read I/O Size (KB)
  • vSAN | Performance | Write I/O Size (KB)
Resynchronization Status ( Metrics applicable for vSAN 6.7 and later)
  • vSAN | Resync | Bytes left to resync (bytes)
  • vSAN | Resync | Resyncing Objects
What If Analysis This is an instanced metric
  • vSAN | What If | Effective Free Space (GB)
Stretched Cluster
  • vSAN|Stretched Cluster|Latency Between Sites|Preferred and Secondary (ms)
  • vSAN|Stretched Cluster|Latency Between Sites|Preferred and Witness (ms)
  • vSAN|Stretched Cluster|Latency Between Sites|Secondary and Witness (ms)
File Share
  • vSAN|FileServices|totalShareCount
File Service
  • vSAN | File Services | File Shares Used Disk Space (GB)
  • vSAN | File Services | Root FS Used Disk Space (GB)
  • vSAN | File Services | File Shares Count
Slack Space
  • vSAN|Slack Space|Internal Operations Capacity (GB)
  • vSAN|Slack Space|Host Rebuild Capacity (GB)
  • vSAN|Slack Space|Transient Capacity Used (GB)