Exinda Network Orchestrator
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Configuring the system to notify you if the APS score drops too low
You can configure the system to send an email if the APS score drops below an APS value you specify and remains below
that value for a specified duration. For example, you can set it to notify you if it drops below 7.0 and stays below 7.0 for 5
minutes.
Making the APS chart easier to read by removing score lines
You can temporarily remove lines from the APS Scores chart by clearing the checkboxes next to the APS name in the
table.
You can zoom into an area of interest by clicking and dragging in the chart to select a smaller time range. This often
has the effect of flattening the lines so that it appears less cluttered.
Related Topics
Configure Application Performance Score Objects
How an Application Performance Score is calculated
Calculating an application performance score
The Application Performance Score object defines the application traffic that will be monitored and which application
performance metrics to evaluate. It also provides application performance thresholds to be used in the evaluation.
For each metric, the observed traffic is compared against the threshold and is classified into one of three categories:
Good — The baseline for the application is good, which indicates that the application is performing within the
expected levels (below the threshold). Users should be happy with application performance.
Tolerated — The performance of the application is less than expected, but still performing within a range that users
should be able to tolerate (between the threshold and four times the threshold).
Frustrated — The application is performing poorly (more than four times the threshold). Users will be frustrated.
The number of good observations for all metrics with a threshold are totaled and given a full weighting; the number of
tolerated observations for all metrics with a threshold are totaled and given a half weighting; and all frustrated
observations are given a zero weighting. These weighted totals are summed and divided by the total observations.
aps = 10 * ((1 x number of satisfied samples) + (0.5 x number of tolerated samples)
+ (0 x number of frustrated samples)) / total samples
EXAMPLE
For HTTP, a threshold is configured for Network Delay as
T = 300 msec
and a threshold is configured for
round-trip time (RTT) as
T = 40 msec
.
In one 10s period, 11 flows are sampled for HTTP with the following results:
2 flow samples have a network delay of > 1200 ms (frustrated samples)
3 flow samples have a network delay of > 300 ms but < 1200 ms (tolerated samples)
6 flow samples have a network delay of < 300 ms (satisfied samples)
1 flow sample has a RTT of > 40 ms but < 160 ms (tolerated samples)
10 flow samples have a RTT of < 40 ms (satisfied samples)
The APS score is calculated as follows:
aps = 10 * ( 1 * (6 + 10) + 0.5 * (3 + 1) + 0 * 2) / 22 = 8.1
Summary of Contents for EXNV-10063
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