Pattern Matching in ND for Analysis
- The root cause can be determined by pattern matching correlating spike with other graphs showing the tendency to vary together.
- Pattern matching feature is used to identify all those graphs that contains a similar pattern. User can correlate two or more graphs from Dashboard for analysis.
Correlation Base for Pattern Matching
- Relationship between all or selected metrics graphs is provided with the help of Pearson R Test (i.e. Pearson Formula)
- The high response time of Server could be because of sudden surge in number of thread hotspots for the same.
Prerequisites for Pattern Matching
- Baseline graph should be there.
- Other graphs should be selected for pattern matching (the user can select single or multiple graphs).
- By default, the threshold value is 80 (the user can change it accordingly).
Steps for creating Pattern Matching
The user needs to follow below steps for pattern matching graphs:
- Select a graph where a spike is recognized, the graph is displayed on the widget panel.
2. Zoom the graph where the spike is noticed so that time period can be applied.
3. Go to “Panel Settings” and click “Pattern Matching” option.
4. The Pattern Matching window is displayed. The selected graph is considered as baseline graph and pattern matching is performed based on the baseline graph.
5. The users can specify the threshold for pattern match as per the requirements. Example:100% threshold means 100% correlation will be searched between all or selected metrics graphs.
6. Specify the threshold value, by default it is 80.
7.To include inverse pattern matching in the comparison criteria, select the “Inverse Pattern Matching” check box. By default, it is selected. Inverse pattern matching compares the baseline graph with anti-graphs also. It means, the graphs with matched pattern in the reverse direction (-ve values) are also compared.
8. Select the category such as “Select Graphs” or “Select Metrics Catalogue”.
For “Select Graphs”
For “Select Metrics Catalogue”
9.On selecting the category (All/Specified/Catalogue), click the Match Pattern button. In this case, we have selected “Select Graphs” as category.
10.The graphs with matched pattern are displayed.
Note: Pattern Matching graphs are sorted based on the matched percentage with the baseline graph. Graphs with high matched percentage are displayed first in the list.
11.First graph is the baseline graph and rest are those graphs whose pattern is match with the baseline graph. Following details are displayed on this window :
- Base Metric Name
- Start Date Time
- End Date Time
- Threshold value
- Related Metric Count
12. On clicking the “Pattern Match Table” icon (at the top), the pattern match results are displayed.
13. The user can view the correlated graphs with percentage by clicking the related metric count. To download this report, click the “Download” button.