XK0-005 · Question #524
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 has reached its maximum permitted throughput, therefore iowait is increasing. The output of iostat -x shows that the device sda has an average throughput of 44.01 MB/s, which is equal to the disk maximum throughput of 44 Mbps. The output also shows that the device…
Question
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 | 44000Kbps Based on the above output, which of the following BEST describes the root cause?
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
(34 responses)- A9% (3)
- B71% (24)
- C15% (5)
- D6% (2)
Explanation
The system has reached its maximum permitted throughput, therefore iowait is increasing. The output of iostat -x shows that the device sda has an average throughput of 44.01 MB/s, which is equal to the disk maximum throughput of 44 Mbps. The output also shows that the device sda has an average iowait of 99.99%, which means that the CPU is waiting for the disk to complete the I/O requests. This indicates that the disk is the bottleneck and the system is slow due to the
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