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Original file line number | Diff line number | Diff line change |
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[role="xpack"] | ||
[[spans]] | ||
=== Span timeline | ||
=== Trace sample timeline | ||
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TIP: A {apm-overview-ref-v}/transaction-spans.html[span] is 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. | ||
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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. | ||
The trace sample timeline visualization is a bird's-eye view of what your application was doing while it was trying to respond to a request. | ||
This makes it useful for visualizing where the selected transaction spent most of its time. | ||
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[role="screenshot"] | ||
image::apm/images/apm-transaction-sample.png[Example of distributed trace colors in the APM app in Kibana] | ||
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View a span in detail by clicking on it in the timeline waterfall. | ||
When you click on an SQL Select database query, | ||
For example, 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. | ||
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||
TIP: A {apm-overview-ref-v}/transaction-spans.html[span] is 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. | ||
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||
[role="screenshot"] | ||
image::apm/images/apm-span-detail.png[Example view of a span detail in the APM app in Kibana] | ||
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If your span timeline is colorful, it's indicative of a <<distributed-tracing,distributed trace>>. | ||
[float] | ||
[[distributed-tracing]] | ||
==== Distributed tracing | ||
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If your trace sample timeline is colorful, it's indicative of a distributed trace. | ||
Services in a distributed trace are separated by color and listed in the order they occur. | ||
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[role="screenshot"] | ||
image::apm/images/apm-services-trace.png[Example of distributed trace colors in the APM app in Kibana] | ||
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Don't forget; a distributed trace includes more than one transaction. | ||
As application architectures are shifting from monolithic to more distributed, service-based architectures, | ||
distributed tracing has become a crucial feature of modern application performance monitoring. | ||
It allows you to trace requests through your service architecture automatically, and visualize those traces in one single view in the APM app. | ||
From initial web requests to your front-end service, to queries made to your back-end services, | ||
this makes finding possible bottlenecks throughout your application much easier and faster. | ||
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[role="screenshot"] | ||
image::apm/images/apm-distributed-tracing.png[Example view of the distributed tracing in APM app in Kibana] | ||
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Don't forget; by definition, 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. | ||
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After exploring these traces, | ||
you can return to the full trace by clicking *View full trace*. | ||
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TIP: Distributed tracing is supported by all APM agents, and there's no additional configuration needed. |
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