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[DOCS] TSVB updates for 7.12 (#93317)
* [DOCS] TSVB updates for 7.12 * Fixes formatting * Clean up * Review comments * Update docs/user/dashboard/tsvb.asciidoc Co-authored-by: Wylie Conlon <wylieconlon@gmail.com> * Update docs/user/dashboard/tsvb.asciidoc Co-authored-by: Wylie Conlon <wylieconlon@gmail.com> * Update docs/user/dashboard/tsvb.asciidoc Co-authored-by: Wylie Conlon <wylieconlon@gmail.com> * Review comments Co-authored-by: Wylie Conlon <wylieconlon@gmail.com>
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Kaarina Tungseth
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[[create-panels-with-timelion]]
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=== Timelion
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Instead of using a visual editor to create charts, you define a graph by chaining functions together, using a timelion specific syntax. This syntax enables some features that classical point series charts don't offer - like drawing data from different indices or data sources into one graph.
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Instead of using a visual editor to create charts, you define a graph by chaining functions together, using the *Timelion*-specific syntax.
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The syntax enables some features that classical point series charts don't offer, such as pulling data from different indices or data sources into one graph.
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[NOTE]
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====
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@ -1,126 +1,165 @@
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[[TSVB]]
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=== TSVB
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*TSVB* requires a date field and supports <<aggregation-reference, most {es} metric aggregations>>, multiple visualization types, custom functions,
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and some math.
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TIP: With *TSVB*, you can visualize the data from multiple series, but only *Timelion* can perform math across layers.
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*TSVB* enables you to visualize the data from multiple data series, supports <<aggregation-reference,
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most {es} metric aggregations>>, multiple visualization types, custom functions, and some math. To use *TSVB*, your data must have a date field.
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[role="screenshot"]
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image::visualize/images/tsvb-screenshot.png[TSVB overview]
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[float]
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[[tsvb-required-choices]]
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==== Requirements
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==== Open and set up TSVB
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When you open *TSVB*, click *Panel options*, then verify the following:
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Open *TSVB*, then make sure the required settings are configured.
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* The index pattern, time field, and interval are configured
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* Specify if you want to show the last bucket, which usually contains partial data
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* For non-time series visualizations, specify if you want the *Data timerange mode*.
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* Specify any <<kuery-query, KQL filters>> to select specific documents
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. On the dashboard, click *Create panel*.
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. On the *New visualization* window, click *TSVB*.
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. In *TSVB*, click *Panel options*, then make sure the following settings are configured:
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* *Index pattern*
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* *Time field*
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* *Interval*
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. Select a *Drop last bucket* option. It is dropped by default because the time filter intersects the time range of the last bucket, but can be enabled to see the partial data.
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. In the *Panel filter* field, specify any <<kuery-query, KQL filters>> to select specific documents.
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[float]
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==== Visualization options
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[[configure-the-data-series]]
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==== Configure the series
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Time series::
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By default, the Y axis shows the full range of data, including zero. To scale the axis from
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the minimum to maximum values of the data automatically, go to *Series > Options > Fill* and set *Fill to 0*.
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You can add annotations to the x-axis based on timestamped documents in a separate {es} index.
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Each *TSVB* visualization shares the same options to create a *Series*. Each series can be thought of as a separate {es} aggregation.
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For each series, the *Options* control the styling and {es} options, and are inherited from *Panel options*.
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When you have separate options for each series, you can compare different {es} indices, and view two time ranges from the same index.
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All other chart types::
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*Panel options > Data timerange mode* controls the timespan used for matching documents.
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*Last value* is unable to match all documents, only the specific interval.
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*Entire timerange* matches all the documents specified in the time filter.
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To configure the value of each series, select the function, then configure the function inputs. Only the last function is displayed.
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Metric, Top N, and Gauge::
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*Panel options > Color rules* contains conditional coloring based on the values.
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. From the *Aggregation* dropdown, select the function for the series.
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Top N and Table::
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When you click a series, *TSVB* applies a filter based
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on the series name. To change this behavior, configure *Panel options > Item URL*,
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which opens a URL instead of applying a filter on click.
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. To display each group separately, select one of the following options from the *Group by* dropdown:
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Markdown::
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Supports Markdown with Handlebars syntax to insert dynamic data. Also supports
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custom CSS using LESS syntax.
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* *Filters* — Groups the data into the specified filters. To differentiate the groups, assign a color to each filter.
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* *Terms* — Displays the top values of the field. The color is only configurable in the *Time Series* chart. To configure, click *Options*, then select an option from the *Split color theme* dropdown.
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. Click *Options*, then configure the inputs for the function.
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[float]
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[[tsvb-series-options]]
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==== Understanding the TSVB series panel
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[[configure-the-visualizations]]
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==== TSVB visualization options
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Every visualization shares the same interface for creating a *Series*.
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Each series can be thought of as a separate {es} aggregation, which prevents
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them from being compared with math. Each series has an *Options* tab
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that controls the styling and {es} options, which are inherited from the *Panel options*.
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Having separate options for each series allows you to compare different
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{es} indices, or to view two time periods from the same index.
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To configure the value of each series, select the function first and then the inputs to
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the function. Only the last function is displayed.
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Series can optionally have a *Group by*, which will show each group separately in the chart.
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The *Filters* grouping lets you assign a color to each filter. The *Terms* grouping has special
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behavior in the *Time series* chart, which is controlled by *Options > Split color theme*.
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The configuration options differ for each *TSVB* visualization.
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[float]
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[[tsvb-reference]]
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==== TSVB reference
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[[tsvb-time-series]]
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===== Time Series
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TSVB has implemented shortcuts for some frequently-used functions.
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By default, the y-axis displays the full range of data, including zero. To automatically scale the y-axis from
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the minimum to maximum values of the data, click *Data > Options > Fill*, then enter `0` in the *Fill* field.
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You can add annotations to the x-axis based on timestamped documents in a separate {es} index.
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Filter ratio::
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Returns a percent value by calculating a metric on two sets of documents. For example, calculate the error rate as a percentage of the overall events over time.
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[float]
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[[all-chart-types-except-time-series]]
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===== All chart types except Time Series
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Counter rate::
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Used for when dealing with monotonically increasing counters. Shortcut for max, derivative and positive only.
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The *Data timerange mode* dropdown in *Panel options* controls the timespan that *TSVB* uses to match documents.
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*Last value* is unable to match all documents, only the specific interval. *Entire timerange* matches all documents specified in the time filter.
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Positive only::
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[float]
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[[metric-topn-gauge]]
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===== Metric, Top N, and Gauge
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*Color rules* in *Panel options* contains conditional coloring based on the values.
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[float]
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[[topn-table]]
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===== Top N and Table
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When you click a series, *TSVB* applies a filter based on the series name.
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To change this behavior, click *Panel options*, then specify a URL in the *Item URL* field, which opens a URL instead of applying a filter on click.
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[float]
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[[tsvb-markdown]]
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===== Markdown
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The *Markdown* visualization supports Markdown with Handlebar (mustache) syntax to insert dynamic data, and supports custom CSS using the LESS syntax.
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[float]
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[[tsvb-function-reference]]
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==== TSVB function reference
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*TSVB* provides you with shortcuts for some frequently-used functions.
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*Filter Ratio*::
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Returns a percent value by calculating a metric on two sets of documents.
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For example, calculate the error rate as a percentage of the overall events over time.
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*Counter Rate*::
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Used when dealing with monotonically increasing counters. Shortcut for *Max*, *Derivative*, and *Positive Only*.
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*Positive Only*::
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Removes any negative values from the results, which can be used as a post-processing step
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after a derivative.
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Series agg::
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*Series Agg*::
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Applies a function to all of the *Group by* series to reduce the values to a single number.
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This function must always be the last metric in the series.
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+
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For example, if the Time series chart is showing 10 series, applying a "sum" series agg will calculate
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For example, if the *Time Series* visualization shows 10 series, the sum *Series Agg* calculates
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the sum of all 10 bars and output a single Y value per X value. This is often confused
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with the overall sum function, which outputs a single Y value per unique series.
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Math::
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The math context is able to do both simple and advanced calculations per series.
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*Math*::
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The math context is able to do simple and advanced calculations per series.
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This function must always be the last metric in the series.
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[float]
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[[tsvb-faq]]
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==== Frequently asked questions
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Why is my TSVB visualization missing data?::
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It depends, but most often it's two causes:
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For answers to frequently asked *TSVB* question, review the following.
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1. If looking at a *Time series* chart with a derivative function, the time interval might be too small.
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Derivatives require sequential values,
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2. If looking at anything but *Time series* in TSVB, the cause is probably the *Data timerange mode*.
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This is controlled by *Panel options > Data timerange mode > Entire time range*. This is because
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TSVB defaults to showing the *last whole bucket*. If the time range is "last 24 hours", and the
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current time is 9:41, then TSVB metrics will be only show 10 minutes: from 9:30 to 9:40.
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[float]
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===== Why is my TSVB visualization missing data?
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How do I calculate the difference between two series?::
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TSVB doesn't support math across series, but <<create-panels-with-timelion, Timelion>> does. <<vega, Vega>> can also do this.
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It depends, but most often there are two causes:
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How do I view the current vs previous month?::
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While it's not possible to do math on these two, TSVB supports series with time offsets.
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Click *Clone Series*, and then choose a new color for the new series. Go toc
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*Options > Offset series time by* and choose an offset value.
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* For *Time series* visualizations with a derivative function, the time interval can be too small. Derivatives require sequential values.
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How do I calculate a month over month change?::
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This is not fully supported in TSVB, but there is a special case that is supported *if* the TSVB
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time range is set to 3 months or more *and* the time interval is one month. Use the `derivative`
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to get the absolute monthly change. To convert to a percent, add a `math` function with the formula
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`params.current / (params.current - params.derivative)`, and then set the formatter to Percent.
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+
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For other types of month over month calculations, use <<create-panels-with-timelion, Timelion>> or <<vega, Vega>>.
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* For all other *TSVB* visualizations, the cause is probably the *Data timerange mode*, which is controlled by *Panel options > Data timerange mode > Entire time range*.
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By default, *TSVB* displays the last whole bucket. For example, if the time filter is set to *Last 24 hours*, and the
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current time is 9:41, *TSVB* displays only the last 10 minutes — from 9:30 to 9:40.
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How do I calculate the duration between start and end of an event?::
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TSVB can't do this because it requires correlation between different time periods. TSVB requires
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that the duration is pre-calculated.
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[float]
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===== How do I calculate the difference between two data series?
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Performing math across data series is unsupported in *TSVB*. To calculate the difference between two data series, use <<create-panels-with-timelion, Timelion>> or <<vega, Vega>>.
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[float]
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===== How do I compare the current versus previous month?
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*TSVB* can display two series with time offsets, but it can't perform math across series. To add a time offset:
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. Click *Clone Series*, then choose a color for the new series.
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+
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[role="screenshot"]
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image::images/tsvb_clone_series.png[Clone Series action]
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. Click *Options*, then enter the offset value in the *Offset series time by* field.
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[float]
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===== How do I calculate a month over month change?
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The ability to calculate a month over month change is not fully supported in *TSVB*, but there is a special case that is supported _if_ the
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time filter is set to 3 months or more _and_ the *Interval* is `1m`. Use the *Derivative* to get the absolute monthly change. To convert to a percent,
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add the *Math* function with the `params.current / (params.current - params.derivative)` formula, then select *Percent* from the *Data Formatter* dropdown.
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For other types of month over month calculations, use <<create-panels-with-timelion, Timelion>> or <<vega, Vega>>.
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[float]
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===== How do I calculate the duration between the start and end of an event?
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Calculating the duration between the start and end of an event is unsupported in *TSVB* because *TSVB* requires correlation between different time periods.
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*TSVB* requires that the duration is pre-calculated.
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