Capacity Planning
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SarCheck allows you to do some basic capacity planning by identifying the resource with the least remaining capacity at its busiest time of day.  The data can be presented graphically and as text in order to be understood quickly.

 

CAPACITY PLANNING SECTION

This section is designed to provide the user with a rudimentary linear capacity planning model and should be used for rough approximations only. These estimates assume that an increase in workload will affect the usage of all resources equally. These estimates should be used on days when the load is heaviest to determine approximately how much spare capacity remains at peak times.

WARNING: Data in this section may be inaccurate because the length of the average sampling interval was only 5.10 minutes. When the interval is less than 10 minutes, peak statistics are likely to underestimate the remaining amount of CPU or disk capacity.

Based on the data available, the system cannot support an increase in workload at peak times without some loss of performance or reliability, and the bottleneck is likely to be disk I/O. Implementation of some of the suggestions in the recommendations section may help to increase the system's capacity.

Graph of remaining room for growth

In the above graph, the end of the memory bar is tapered because it represents more of an approximation than the others. The CPU can support an increase in workload of approximately 20 percent at peak times. Since a non-trivial level of page outs and/or swapping were detected, the amount of memory present will have trouble supporting an increase in workload of more than roughly 25 percent at peak times. The busiest disk can support a workload increase of approximately 0 percent at peak times. For more information on peak resource utilization, refer to the Resource Analysis section of this report.