XK0-005 · Question #1519
An administrator is trying to diagnose a performance issue and is reviewing the following output: System Properties: CPU: 4 vCPU Memory: 40GB Disk maximum IOPS: 690 Disk maximum throughput: 44Mbps |…
The correct answer is B. The system has reached its maximum permitted throughput, therefore iowait is increasing. The system properties show a disk maximum throughput of 44Mbps (44,000 Kbps). When a system reaches its maximum permitted disk throughput, I/O operations begin to queue and the CPU spends time waiting for I/O to complete - this is measured as iowait. The disk isn't necessarily…
Question
Exhibit
Options
- AThe system has reached its maximum IOPS, causing the system to be slow.
- BThe system has reached its maximum permitted throughput, therefore iowait is increasing.
- CThe system is mostly idle, therefore the iowait is high.
- DThe system has a partitioned disk, which causes the IOPS to be doubled.
How the community answered
(26 responses)- A15% (4)
- B73% (19)
- C8% (2)
- D4% (1)
Explanation
The system properties show a disk maximum throughput of 44Mbps (44,000 Kbps). When a system reaches its maximum permitted disk throughput, I/O operations begin to queue and the CPU spends time waiting for I/O to complete - this is measured as iowait. The disk isn't necessarily maxing out IOPS (A), and there's no indication the system is idle (C) or that the disk is partitioned and doubling IOPS (D). The throughput ceiling being hit is the most likely bottleneck causing performance degradation, making B the best answer.
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