Performance Analytics

Performance Analytics enables you to track, aggregate, and visualize key performance indicators for any specific time-period. Performance Analytics in
DX Operational Intelligence
allows you to:
  • Detect performance bottlenecks and anomalies.
  • Compare multiple metrics for the same devices, interfaces, networks.
  • Compare multiple metrics across multiple entities.
  • Compare uni-variate metrics across single and multiple entities.
  • Compare multivariate metrics across multiple entities.
An
Entity
can be one of the following types:
  • Groups
  • Services
  • Application
  • Device - For the network device, the interfaces can be selected as a context using the device itself.
Access Performance Analytics
Performance Analytics provides a historical analysis of multiple metrics and its machine learning based anomaly detection helps identify issues proactively. You can access Performance Analytics in two ways:
Follow these steps:
  1. Log in to
    DX Operational Intelligence
    , and click on from the left-navigation pane.
    1. Click the Ellipse.PNG  button.
      The
      Select context
      page appears.
  2. To view the performance charts in
    context of an Alarm
    , use the following steps:
    1. Click the
      Alarms
      icon on the navigation panel.
      The
      Service a
      larms
      page appears.
    2. Click on an alarm from the list of alarms.
      The row expands and displays the
      Alarm
      details,
      Affected metrics
      ,
      Impacted services,
      Topology
      and
      Annotation
      .
    3. Navigate to
      Affected metric
      tab.
      The performance chart for the selected metrics appears.
    4. From the
      Affected metric
      tab, click on
      Compare Metrics
       below the chart.
      The
      Performance Analytics
      page is launched in context of the selected entity and alarm affected metric.
The following illustration depicts how you can access Performance Analytics:
The metrics can be ingested into Performance Analytics from the source products listed in Compatibility Matrix. The metric store processes raw metrics along with perform aggregation and anomaly detection. For more information on metric management, see Metric Management, and for more information on anomaly detection, see Anomaly Detection.
Performance Analytics  User Interface
When you launch Performance Analytics page from the navigation pane for the first time, the page would be empty and you would be required to select the context and metrics. If you already have a saved view with context and metrics, then the Performance Analytics page opens with the default saved view. When you navigate from the Alarm Analytics page in the context of an alarm, the Performance Analytics page opens with the corresponding charts of the alarm.
Step 1: Select a Context
To
Select a context
, perform the following steps:
  1. From the
    Performance Analytics
    page, click the Ellipse.PNG  button.
    The
    Select context
    page appears.
  2. Set the entity context by selecting entities from the available list of entities. Use the
    Filter
    field to search for the entities.Global Filter.png
    Filter
    You can use the Global
    Filter
    field to perform a text search across all the columns, and you can perform a more context based search using the context
    Filter
    field.
    Search for Interfaces
    :
    • In the column search Filter, search for
      Type: Devices
      to get the results for associated interfaces with the router or switch.
    • In the column search Filter, search for
      Entity Names
      to get the results for associated interfaces with the router or switch.
    • If you know the Interface name already, then you can search the specific interface name using the global filter.
    Global Filter.png
    States are calculated when a tenant has at least one service created. If the tenant has no services created, then all the entities are displayed as Normal.
  3. (Optional) You can sort the
    Entity names
    column in ascending and descending order:
    • By default, the entities are sorted in ascending order Ascending Icon.PNG .
    • To sort a column in descending order, click the column name till the descending order icon Descending Icon.PNGappear.
  4. To view only the selected entities, enable the
    Display ONLY selected
    option.
  5. Click
    Done
    at the top-left of the page.
    The
    Performance Analytics
    page is set in the context of the selected entities. For
    Entities
    , the page title is the name of the first entity and the number in the brackets is the count of the remaining selected entities.
    If you do not select any entity, the
    Performance Analytics
    page shows a blank page. Use the
    Ellipse.PNG button to set the entity context.
Step 2: Select the Metrics
After you selected the required entity context, you can proceed with the following steps:
  1. From the selected entity page, click on
    Metrics
    option.
    The list of available Metrics and Configuration Items (CIs) for the selected entities appear. The hierarchy that builds up  depends on the selected context. If the selected context entity has more CIs associated to it, then the hierarchy builds up in such a way that you view the list of CIs and the associated metrics of the CIs.
  2. Select an
    Entity
    and click the drop-down arrow to view the associated
    Configuration Items
    .
    The list of associated CIs appear.
  3. Click the drop-down arrow to view the associated
    Metrics Family
    .
  4. Click the drop-down arrow to view the associated
    Metrics
    of the CIs. You can also click
    Filter
    at the parent level to view the associated child entities.
    • The hierarchies may vary from one source product to another.
    • In the context search for an alarm or interface, sometimes you might not see the interface in context on the
      Available metrics
      editor, so filtering on that interface shows that interface and the selected metrics which is being plotted.
    • While working on the Application context of APM sources, the APM entities that you select might not display the associated hierarchies. You must select the corresponding APM agent, then you can see the exact hierarchies and metrics.
  5. (Optional) Enable the
    Display Selected Metrics
    option to view only the metrics that you have selected.
  6. Click the
    Add Metric (+)
    button to add performance chart.
    The performance charts for the selected metrics appear on the Performance Analytics page.
Step 3: Metric Charts Views
This section describes the following chart views that are displayed based on data available:
  • Timeline Series Probability Bands
  • Timeline Series (Line) Charts
The
Timeline Series Probability Bands
are shown when there is a single metric selected, and for that metric anomaly detection is also configured. The
Timeline Series (Line) Charts
are shown when there is more than one entity being plotted on the same chart or the selected metric does not have anomaly detection configured.
Timeline Chart
If you have selected more than one Configuration Item or aggregation type as an entity, a timeline series chart is plotted. Click the legend to view the respective series in the chart. Timeline chart.png
Probability Band Charts: Interpret the Green Highway Band
If only a single Configuration Item (CI) is selected from the metric type family, a chart with probability bands is plotted. Based on the duration and frequency of the data that is captured the chart displays a Solid Green Highway Band, a Hash-Patterned Green Highway Band, or an Intermittent Pattern. You interpret the prediction bands to understand the performance of the metric.
When data for the metric is too large, a time slider is available below the chart. Use the time slider to select a time range and view details for a selected period. Three zones display the different prediction intervals present in the historical data. Scan the chart to identify points in time where an alarm was triggered, and where analytic data falls outside of the established norm for a component on your system. For more information on anomaly detection, see Anomaly Detection.
  • You might experience a data break while using the Green Highway Bands for CA UIM and DX PM source products.This will be handled in a future rollout.
  • The following metrics does not generate Metric Charts:
    • DX APM - current capacity (bytes), amount of space used (bytes)
    • DX PM - availability
PFA Metric Chart.png
A legend displays the different elements of the chart: Legend.png You can switch the display of the different zones (rare, probable, common, and center) using the checkbox in the chart legend. For example, you can hide the display of the common and probable zones so it is easier to view high severity (rare) activity.
The chart combines information that is designed to help you quickly review and interpret activity for a metric in your environment. The various components of the chart are as follows:
  • Actual Data
    Actual data is illustrated as a black solid line (no alarms) or a colored solid line (alarm state) on the chart. The line is calculated from actual data for the metric. By comparing actual data and the median value, you can quickly see variations for the metric in your environment. When an alert occurs, the black line changes to a colored solid line that matches the alert severity and displays icons with the matching severity.
    For example, red for critical anomaly alarm, orange for major anomaly alarm, and yellow for minor anomaly alarm
  • Mean Value for the Metric
    The mean value or average for your metric is illustrated as a gray line on the chart. The mean value is displayed when there is not enough historical data.
  • Center Value for the Metric
    The center line is the middle of the range or median for the data and is shown as a green dotted line. The zones closest to the center line are closest to the most common measurements for the data.
  • Common Data
    Common zone data tracks closest to the center line, or the norm for your metric, and displays as a dark green band. The analytics calculations place the common zone as one percentile above or below the norm.
  • Probable Data
    Probable zone data is illustrated as a green band on the chart. The analytics calculations place the probable zone two percentile points above or below the norm.
  • Rare Data
    Rare zone data is illustrated as a light green band on the chart. The analytic place the rare zone three percentile points above or below the norm, and signal a metric behavior outside the normal range.
  • You can also view the chart data for an instant when you move your mouse over the chart to display dynamic information in a popup. For example, when you pan over the zones, each data point in time is summarized in a popup:
    details.png
Hash-Patterned Green Highway
  • When limited data is available for a metric initially, the Green Highway chart displays a hash-patterned band and represents recently observed performance of the metric, for example, in cases where a metric is newly added.
  • The alerts that are produced are based on comparison between the most recently captured data (last few hours) and the data from longer timescales (days). As DX Operational Intelligence captures more data for a metric, the Green Highway chart switches to displaying from hashed to a solid pattern. Timescales for such a switch vary based on how often a given metric is collected and forecasts are calculated. For metrics that are reported to DX Operational Intelligence once per hour or more often, solid Green Highways appear within a week.
    The following image is an example of a hash-patterned Green Highway:
    EWMA Hash Pattern Band.png
  • Intermittent Hash-Pattern
    When the number of data points are enough for the Solid Green Highways, then there is a switch from the Hash-Pattern to Solid Green Highways that is when you can see the Intermittent Hash-Pattern. The following image is an example of an intermittent pattern that occurs when there is a mismatch in the time of the data collection and the occurrence:
    Intermittent Hash Patterns.png
Solid Green Highway
  • Explore Green Highway charts, which are a summary of past metric behavior at specific stages of your business cycle. These charts provide not only a qualitative description of when your system is the most or least active, but a quantitative description of what values for each metric are typical, and a forecast of where new values may appear.
  • Produce anomaly alerts that are derived from the Green Highways. Because the Green Highways describe the likelihood of metric values, they also describe what values would be anomalous. DX Operational Intelligence uses Green Highways to:
    • Generate statistical anomaly alerts for both individual extreme values
    • Generate a series of values which are individually not unusual, but anomalous when observed together
Performance Analytics Page
This section describes the Performance Analytics page that appears after you have selected devices:
Performance Analytics Page.png
  1. Context Selection
    – Using this button, you can add or remove entities for which available metric charts are to be generated. Use the
    Filter
    field to search for the entities.
  2. Aggregation Interval –
    Use the aggregation interval drop-down to specify the interval at which data aggregation takes place. If you select
    Raw
    option from this drop-down, line charts are plotted in the metric charts and you cannot synchronize the metric charts. By default,
    Raw
    option is selected. If you select a time range within 3 days, then the charts are plotted on raw metrics. If you select a time range beyond 3 days, then the charts are plotted on 15 minute aggregates and daily aggregates. For more information, see Metric Management.
  3. Grid View
    – Use the buttons to specify the number of metric charts to be shown in each row.
  4. Save View
    - Use this button to save a view. Once you select some entities and metrics, you can save your selections along with the metrics units as a view. So, when you refer back to your Performance Analytics page, you can see the saved view with metrics and metric units. For more information on the list of actions that you can perform on
    Save View
    , see Manage Views.
    In the Saved Views, if you have charts built on top of third-party metrics, the deselection of the charts will not be available.
  5. Metrics
    – Use this button to view the list of available metrics for the selected entities. Metrics are grouped based on the metric type. Configuration Items that belong to the same metric type are nested into the respective entity host name.
  6. Time Slider –
    Use this ellipse button to synchronize metric charts and view the synchronized timeline for a selected metric chart or all charts.
  7. Chart View
    – Selecting the metric creates a chart in the Charts panel. If only a single CI is selected from the metric type, a chart with probability bands is plotted. If you select more than one CI or multiple aggregation types are set to the entity, a line series chart is plotted.
Synchronize Metric Charts
You can synchronize metric charts and view the synchronized timeline for a selected metric chart or all charts.
Follow these steps:
  1. Select the required entities in the
    Performance Analytics
    page.
  2. Select the metrics from the
    Available Metrics
    palette.
    The metric charts are displayed.
  3. Select an
    Aggregation Interval
    from the drop-down.
  4. To synchronize a chart, switch on the synchronize toggle from the ellipsis button of a chart.
    The metric chart is synchronized according to the specified aggregation level. Use the Re-sync all time sliders option to synchronize all metric charts.
  • Synchronization is possible only on time-based interval data, and not on raw data. By default, charts are synced and the default time interval is 10 minutes.
    • If there are pre-existing entities with metric units, then these metrics would not be available in your current view after the current SaaS rollout. The metric units are available only for the newly created views. For more information, see Manage Views.
Filter by Time Range
Click the date/time picker Time Filter.png icon to select the duration for which you want to view the performance analytics for the selected entities. By default, the duration is one week. When you are accessing the Performance Analytics page from the navigation panel, then the default duration is one week.
When you access the performance analytics page in the context of an affected alarm metric, then the default duration is calculated by (-8 hours + 1 hour) from the alarm creation time. the calendar is updated to match the last updated time of the affected alarm. This range is 8 hours before the last alarm update to one hour after the last alarm update.
You can use the date/time picker filter to set the duration for your search, that were created for a specific time period such as 1 hour, 24 hours, 1 week and so on. Performance Analytics also provides you with a
Custom
option, which enables you to pick a particular start date/time and a particular end date/time to help you narrow down the metrics that you are looking for.
If you select a time range within 3 days, then the charts are plotted on raw metrics. If you select a time range beyond 3 days, then the charts are plotted on 15 minute aggregates and daily aggregates. For more information, see Metric Management.