Users are reporting that a Linux server is responding slowly. A systems administrator troubleshooting the server issue sees the following: Which of the following is most likely the issue?

The correct answer is A. The CPU is mostly waiting for I/O operations. The high %iowait value (50.38%) in the iostat output suggests that the CPU is waiting for I/O operations to complete, often caused by storage bottlenecks rather than a lack of CPU or memory resources.

Troubleshooting

Question

Users are reporting that a Linux server is responding slowly. A systems administrator troubleshooting the server issue sees the following:

Which of the following is most likely the issue?

Options

AThe CPU is mostly waiting for I/O operations.
B/ filesystem does not have enough storage allocated.
C/var filesystem is almost full.
DThe CPU capacity is inadequate.

How the community answered

(40 responses)

A
80% (32)
B
13% (5)
C
5% (2)
D
3% (1)

Explanation

The high %iowait value (50.38%) in the iostat output suggests that the CPU is waiting for I/O operations to complete, often caused by storage bottlenecks rather than a lack of CPU or memory resources.

Topics

#Linux performance#I/O bottlenecks#Troubleshooting#System resource monitoring

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