mirror of
https://github.com/elastic/kibana.git
synced 2025-04-22 08:49:27 -04:00
40 lines
2.2 KiB
Text
40 lines
2.2 KiB
Text
[[spans]]
|
|
=== Span timeline
|
|
|
|
TIP: A {apm-overview-ref-70}/transaction-spans.html[span] is defined as the duration of a single event.
|
|
Spans are automatically captured by APM agents, and you can also define custom spans.
|
|
Each span has a type and is defined by a different color in the timeline/waterfall visualization.
|
|
|
|
The span timeline visualization is a bird's-eye view of what your application was doing while it was trying to respond to the request that came in.
|
|
This makes it useful for visualizing where the selected transaction spent most of its time.
|
|
|
|
[role="screenshot"]
|
|
image::apm/images/apm-distributed-tracing.png[Example view of the distributed tracing in APM app in Kibana]
|
|
|
|
View a span in detail by clicking on it in the timeline waterfall.
|
|
When you click on an SQL Select database query,
|
|
the information displayed includes the actual SQL that was executed, how long it took,
|
|
and the percentage of the trace's total time.
|
|
You also get a stack trace, which shows the SQL query in your code.
|
|
Finally, APM knows which files are your code and which are just modules or libraries that you've installed.
|
|
These library frames will be minimized by default in order to show you the most relevant stack trace.
|
|
|
|
[role="screenshot"]
|
|
image::apm/images/apm-span-detail.png[Example view of a span detail in the APM app in Kibana]
|
|
|
|
If your span timeline is colorful, it's indicative of a <<distributed-tracing,distributed trace>>.
|
|
Services in a distributed trace are separated by color and listed in the order they occur.
|
|
|
|
[role="screenshot"]
|
|
image::apm/images/apm-services-trace.png[Example of distributed trace colors in the APM app in Kibana]
|
|
|
|
Don't forget, a distributed trace includes more than one transaction.
|
|
When viewing these distributed traces in the timeline waterfall, you'll see this image:apm/images/transaction-icon.png[APM icon] icon,
|
|
which indicates the next transaction in the trace.
|
|
These transactions can be expanded and viewed in detail by clicking on them.
|
|
|
|
After exploring these traces,
|
|
you can return to the full trace by clicking *View full trace* in the upper right hand corner of the page.
|
|
|
|
[role="screenshot"]
|
|
image::apm/images/apm-transaction-sample.png[Example of distributed trace colors in the APM app in Kibana]
|