Home » VMware » VCP550D » What esxtop statistic should the administrator examine in order to validate that the guest OS is experiencing performance degradation?
A user has submitted a trouble ticket complaining that the email server VM has become very sluggish. After looking at the logs, the vSphere administrator suspects the iSCSI network is experiencing congestion.
What esxtop statistic should the administrator examine in order to validate that the guest OS is experiencing performance degradation?
A. GAVG/wr
B. %ACTV
C. PATH
D. PKTRXMUL/s
Correct Answer: A
Explanation/Reference:
Explanation:
The esxtop command-line utility provides a detailed look at how ESXi uses resources in real time.
The GAVG/wr statistic is the average guest operating system write latency per write operation in milliseconds. In an email server, all emails sent and received are written to a database. A high latency per write operation would cause the email server to perform poorly when writing to its database.
Incorrect Answers:
B: The %ACTV statistic is the number of commands in the ESXi VMkernel that are currently active. This value is more indicative of host performance than VM guest operating system performance. Therefore, this answer is incorrect.
C: The PATH option is used to display the path to storage. It is not an indicator of performance. Therefore, this answer is incorrect.
D: The PKTRXMUL/s statistic is the number of multicast packets received per second. It is not used to determine VM guest operating system performance. Therefore, this answer is incorrect.
References:
http://pubs.vmware.com/vsphere-55/index.jsp#com.vmware.vsphere.monitoring.doc/GUID-A27C3166-DBD1-4E0B-917B-67EF56864F9B.html
