HP-UX 11i Tuning and Performance

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9.9. Types of Disk Bottlenecks

As with other types of bottlenecks, the four types are:

Saturation— indicated by 100% disk utilization on one or more disks
Queue— indicated by large per-disk queues sustained over time or a high percentage of processes blocked on disk, cache, or inode
Starvation— less than 100% CPU utilization, and memory bottlenecks
User satisfaction— poor transaction response time

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