Maximum Queue Depth By Host This chart displays maximum queue depth that each host is currently maintaining for the datastore. When Storage I/O is enabled, queue depth can change over time when congestion is detected at the array. This chart is located in the Performance view of the datastore Performance tab. Table 32. Data Counters Chart Label Description Maximum Queue Depth Maximum queue depth. Queue depth is the number of commands the SCSI driver queues to the HBA. ■ Counter: maxQueueDepth ■ Stats Type: Absolute ■ Unit: Number ■ Rollup Type: Average ■ Collection Level: 2