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Network Interface
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Monitor the rate at which data is sent
and received via the network interface card. This should remain below 50
percent of network capacity.
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Performance Counter
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Description
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Processor
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You should monitor processor performance to ensure that all processor
usage does not remain consistently high (over 80 percent) as this indicates
that the system would not be able to handle any sudden surges of activity.
And that in the common state, you will not see a domino effect if one
component failure will bring the remaining components to a malfunctioning
state. For example, if you have three web servers, you should make sure that
the average CPU across all servers is under 60% so that if one fails, there
is still room for the other two to absorb the additional load.
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Network Interface
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Monitor the rate at which data is sent and received via the network
interface card. This should remain below 50 percent of network capacity.
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Disks and Cache
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There are several logical disk options that you should monitor
regularly. The available disk space is important in any capacity study, but
you should also review the time that the disk is idle. Dependent on the types
of applications or services that you are running on your servers, you may
review disk read and write times. Extended queuing for write or read function
will affect performance. The cache has a major effect on read and write
operations. You must monitor for increased cache failures.
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Memory and Paging File
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Monitor how much physical memory is available for allocation.
Insufficient memory will lead to excessive use of the page file and an
increase in the number of page faults per second.
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