The timeline appears embedded at the top left of the search window by default. This useful graph shows a count of the queried events over the period of time set in the Time range selector (more info on the Time range selector in tab 4). The data counts represented in the timeline are plotted before the actual events are loaded in the browser. To avoid overloading the browser's memory, not all the events in the data table are downloaded to the browser. Instead, Devo downloads events in interval blocks within the time range selected. This is important to understand, especially with respect to using the Get Server Counts and Event Loading Indicator described below.
You can pop it out of the window so you can place it freely on your screen, or you can close it. After closing it, you can open it again by clicking the gear icon in the toolbar and then selecting the gear icon and clicking Tools → Event timeline.
The timeline is a dynamic graph and gives you the ability to:
Hover over the timeline to show the count of events at a specific time.
Click and drag the mouse across a segment of the timeline to display only the event count and data for that period, narrowing the range of analysis. Use the Back button to go back to previously selected periods.
Click on the timeline to rerender the data table with the events available at that date and time. In this way, you can use the timeline to navigate the events in the table. If the events from the selected date/time have not yet been downloaded to the browser, this will download them. When this occurs, a blue band appears in the timeline indicating those events that are being downloaded to the browser. Alternatively, you can use the table scroll bar to download events to the data table.
The following table describes the settings above the timeline:
Events per | This determines the intervals at which event counts are totaled and plotted on the timeline. When you hover over the timeline, tooltips appear reporting event totals. The points along the timeline are determined by the Events per set. Auto sets the interval based on the query's current time range. Use this setting if you want to plot event counts at a specific interval. |
|---|---|
Logarithmic scale | This applies a logarithmic scale to the y-axis of the timeline chart instead of the default scale, which uses uniform intervals of units. This can be especially helpful when outlying data is causing significant spikes or dives, distorting your ability to visualize the detail of the timeline. |
Full counts | This toggle appears after applying a filter to your data. When your data is filtered, the green line automatically adjusts to represent the number of events with the filter applied. Activate this toggle to display a comparison between the count of filtered events (green line) and the full count of events (yellow line).  |
Get server counts | This button appears after applying a filter to your data. Select it to plot the real count of events in the timeline after applying a filter. When you apply a filter, segments of the timeline may appear as dotted lines, indicating that the counts are actually estimated values for those subintervals that have not been downloaded to the browser. Click this button to obtain the actual counts for the dotted segments. The line will change from dotted to continuous. Note that this doesn’t mean the actual events are downloaded to the browser, just that the real event count is reflected in the timeline.  |