An administrator runs `top` and observes that many processes are in state `D` (uninterruptible sleep) and the system load average is 15 on a 4-CPU system. What does state `D` primarily indicate?

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B. Processes are blocked on I/O operations, indicating a likely storage or network I/O bottleneck. Processes in the `D` (uninterruptible sleep) state are blocked waiting for I/O operations — typically disk reads/writes or NFS operations — to complete. Unlike interruptible sleep (`S` state), `D` state processes cannot be killed or interrupted by signals. High numbers of `D` state processes combined with elevated load average strongly indicate an I/O bottleneck.

An administrator runs `top` and observes that many processes are in state `D` (uninterruptible sleep) and the system load average is 15 on a 4-CPU system. What does state `D` primarily indicate?

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An administrator runs top and observes that many processes are in state D (uninterruptible sleep) and the system load average is 15 on a 4-CPU system. What does state D primarily indicate?

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Discussion

An administrator runs `top` and observes that many processes are in state `D` (uninterruptible sleep) and the system load average is 15 on a 4-CPU system. What does state `D` primarily indicate?