Heather is the administrator of Appachi web server. She notices that the server is running
considerably slow. She is looking for bottlenecks. She suspects that memory is low.
Which of the following commands should Heather execute to locate the bottlenecks in
her system?

A.
Top

B.
Perform

C.
VMSTAT

D.
NETSTAT

Explanation:
VMSTAT can be used with performance monitor to classify different
performance variables, including CPU, Memory an I/O.
Incorrect Answers:
A: TOP provides the same information as the ps (report process status) command, but asan
interactive screen that shows snapshots of the current system performance.
Sometimesbottlenecks do not show up when doing an instantaneous snapshot, and requires
acommand that gathers history over a period of time. TOP also provides information onCPU
processing, and would not help in diagnosing a memory issue.
B: Perform is used in Windows systems, and is not available in a Linux system.
D: NETSTAT is a TCP/IP command for displaying routes and ports. It is not used formachine
performance reporting.