Q: 6
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
Discussion
B , system hits the max throughput cap first so that's what drives the high iowait. IOPS isn't maxed out yet. Pretty sure about this but open to other takes.
B tbh, the question tricks you into considering IOPS but it's actually throughput (hit first). Saw similar on practice, always B when iowait's tied to max throughput not IOPS.
B , had something like this in a mock and B was correct.
B , since throughput maxing hits iowait hardest, not IOPS here.
Its A for me since the system could hit its max IOPS if there are a ton of tiny reads/writes happening. Throughput is important too but IOPS maxing out can totally cause slowdown, seen it before with database workloads. Correct me if I'm off on this one.
Option A
C/D? Both mention disk issues, but not sure which clue fits better.
B , throughput getting maxed is what kicks up the iowait, not IOPS. I think that's the trap here.
Its B, but only because the throughput limit is hit first before IOPS actually maxes out.
I don't think it's A. B is more likely, since the throughput is at max but IOPS isn’t. That usually means disk can’t move data any faster and iowait shoots up. Pretty sure that's what the question’s looking for, but open to other views.
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